I don't see where these categories (Sport, SD, Fitness)have to be mutually exclsusive. Sure, there are plenty of schools that focus on one over the others, and there are plenty of schools that don't do any of them well. That's a problem with a given school...not TKD.
Here's the thing. I'm a KKW/WTF guy...why? because when I signed up for that first TKD class...I chose a school based on the instructor and what I thought my son (and later myself) could learn from him. I didn't know about WTF, ITf or any of it...and I was a very experienced martial artsits at that time (just not an experienced TKD'ist). I get a bit defensive...I bristle as it were when I am called EVIL. When I am told that I cannot defend myself because all I do is SPORT. Basically, that BS is just downright disrespectful and totally diosregards all the hard work I've done, am doing and will continue to do in the future.
I do engage in rthe sproting aspects of WTF TKD. I'm an assistant coach on our competition team and put in lots of extra hours training these young athletes to compete locally and nationally. None of them will be goign to the olympics. Yes, for comeptition I say they should spar hands down (ONLY in competition). I also train hard to do what they do...the extra sparring (limited ruleset though it may be) and he extra trainign has improved my fitness (strength, speed, endurance and flexibility). I'm probably at my healthiest I've ever been due to this sport training...and y'know what? I'm better able to defend myself. My footwork, speed and improved endurance garauntee I'll do bette r in a fight now than i would have before I notched up my training. Sure, I could have done the improved training wihtout the sprot...but heck, the sport is fun and that kind of reinforcement has spurred me on to do the unfun extra hardwork.
I train primarily for SD. yes, in KKW school that's what i do. We have a set SD curriculum that goes all the way through 3rd dan. Primarily one step punch sparring and one step self defense moves...we also teach grappling. I work that stuff hard and when i trian others (especially the kids) I don't let them get away with weak technqiues. Furthermore, basedon hte forms based Sd stuff from Mr. o'neil, Mr. Anslow and others...I';ve gotten the go ahead to put together and teach a seminar on poomse based self-defense.
So, You see....my regular training encompasses all three aspects of TKD...at what is often branded a one dimensional organization. But, y'know I'm evil so it's best if you just ignore that as I'll lead you astray down the wrong path or something...I dunno.
Bottom line, old school TKD is what one does when they train hard. A lot of people don't...and I think that has always been the case. We (those of us who train hard, who are really invested) tend to look at things from a scewed perspective. Nothing's wrong with that, but keep in mind 90% of the rest of the populace thinks were nuts.
Peace,
Erik