Hmm, this has gotten interesting. I've read through what has been written here over the last day or so, and there's a few points I wouldn't mind making.
Sgtmac_46, I have a lot of respect for you and your posts here, however I feel you are missing what is actually being said, and indeed may be reading certain things into posts that I don't think are actually there. To begin with, I haven't seen a single person here claim that non- or light-contact is good for any form of self defence or fighting (yes, they are quite different, but I'll get to that in a bit), or indeed that hard contact is not beneficial (I would actually say it's a requirement if you are being serious about any self defence benefits from your training at all). The point made has been that hard
sparring is not required. You have then equated fighting and self defence by limiting the self defence aspect to purely physical aspects. So maybe a clarification of terms may be in order (from the non-sparring camp).
Fighting: Two or more people "duking it out", exchanging blows in an attempt to "beat" the other person(s). In this form there is not an attempt made to flee, or look for opportunities to flee (possibly for fear of being seen as a coward, social or cultural conditioning).
Self Defence: One or more people being confronted/attacked by one or more aggressors. This situation has defined aggressors, and the attackers attempt to injure/intimidate/menace the defenders, and the defenders concern themselves with their safety first and foremost. This can take many forms ranging from avoidance of dangerous situations, through to defusing aggression, pre-emptively striking, and all out physical assaults. The aim, as opposed to fighting, is never to stay and fight though.
Any realistic self defence training will involve hard contact. That can be achieved in a number of ways, however the real argument here is that sparring is not actually the ideal method (although it certainly can help), mainly due to the fact that it deals with the concept of "fighting" rather than the aim of self defence. Now, for yourself, as you said you are an LEO, and as such have a different set of requirements (including needing to be the aggressor in cases, stand-and-fight in others, and so on), but surely that means you recognise that what you are describing (as suits your needs) is not what would be classed as self defence here?
To go through the benefits and issues with sparring, and it's help or hindrance with self defence capabilities, let's make a list.
PRO 1: Sparring teaches you to handle the chaos of a "live" environment (for want of a better term).
PRO 2: Sparring (hard) gets you used to both hitting and getting hit, overcoming the emotional barriers that can very easily get in the way, especially if you have never done this before.
PRO 3: Sparring (hard) sharpens timing, distance (both offensive and defensive), as well as acting as a "correcting" mechanism for your techniques (if you are bending your wrist when you punch, it'll hurt. So you change).
PRO 4: Sparring gets you used to a degree of adrenaline.
PRO 5: Sparring helps your aerobic fitness, helping you to not "gas out" early on.
Some good pros there, I feel. We'll come back to them.
ISSUE 1: Sparring is training in tactics and strategies for fighting, rather than defence, ingraining habits that can be dangerous (not escaping if and when an opportunity presents itself).
ISSUE 2: Sparring gives you an unrealistic opponent, one trained in the same (or similar) methods and techniques to yourself, giving rise to a degree of predictability in the attacks you face, and the defences applied.
ISSUE 3: Sparring gives an unrealistic expectation of preparation, knowing ahead of time (even if only ten seconds or so) who your opponent is, how many there are (typically one), what the conditions are etc. You also know the direction they are coming from (typically directly in front of you as you, allowing both you and them time to get into position/posture).
ISSUE 4: In order to achieve safety, a number of tactics/techniques are disallowed, particularly the more damaging or immediately effective.
So the question becomes not if hard sparring has benefits, but if it really is the best method for self defence? What if there was a way of training that incorporated most or all of the benefits of hard sparring, with few or none of the issues? Happily, the answer is yes.
There are a large number of methods employed to do that, a few are as follows:
Piggy in the Middle Drill: The defender is in the centre, with a large number of "attackers" surrounding them. The attackers attack the defender one at a time, or in groups or two or more, with weapons or without, in any way they want. The defender has any method of responce they want. Contact can be very hard, and protective equipment can be worn if desired. Ramp up to taste. (PROS:1,2,3,4,5, ISSUES
depending on skill levels) 1)
Boogeyman Drill: During a regular training session one of the students (unknown to the rest of the group, although they will know that it is a concept that will be employed) is designated as a "boogeyman". During the class, that person can attack any other member of the class (even the instructor...) at any time, in any way, with any attack or weapon. Whoever is attacked responds in whatever way they can. Lots of fun when the "attacker" in another drill suddenly finds themselves under attack... (PROS: 1,2,3,4, ISSUES: None as listed)
Whack-a-mole Drill: Put on some good headgear, and put in a mouthguard. Your attacker hits you hard in the head, you immediately turn to apply a drill (strike a pad, defend a rush-tackle, cover against strikes, perform a takedown, etc) (PROS: 2,3,4, ISSUES: 3 (althought that can be overcome with multiple partners)).
These are just a few drills, there are many many more. To note, though, RBSD systems do not spar. Systems such as Ninjutsu do not spar. Traditional sword systems do not spar. Many others do not spar. I must say that I am a little unsure why you feel that the only reason other martial artists don't spar is that they are scared of it. Personally, I have done my time in sparring systems, and we encourage our seniors to cross train in systems such as MMA, BJJ, Muay Thai, Boxing, and others for many reasons. The reasons we don't spar is that it goes against what we understand to be truly effective in generating success and the correct skill set, nothing to do with fear. In fact, I have recently been telling my students to be careful of too much safety in training (training weapons that are too safe, for example) as it leads to dangerous feelings of safety, as I feel that an element of danger is necessary for these arts (on many levels, not just the immediately practical).
For the record, here is a clip of Richard Dmitri applying his RBSD concepts (non-sparring) against a BJJ guy (very hard sparring), just to see the results:
The only thing being said here is that sparring is not the only way to get the skills you are talking about, and there seems to be universal agreement that for self defence, if real contact and hard conditioning are not included, then the training will be rather lacking. That said, this thread is about the benefits/issues with point sparring (as it occurs in non-contact sporting systems; get a point and stop etc), so this conversation of hard sparring versus not sparring at all isn't really the argument. Again, we all seem to agree that hard-style training and contact are important... provided you are training for self defence reasons (just that sparring isn't the only way to achieve that, nor necessarily the best, at least for everyone). Of course, this is making a basic assumption that everyone is training for those reasons. Remember, if someone is training in their system in order to enjoy competition and win tournaments, and those tournaments are designed around point-sparring style matches, it's absolutely ideal. Different strokes and all that... But back on the topic of point sparring, okay? I think we've taken this part about as far as we can.