Actually, no they don't. It's a good idea that they are (in the main... some don't need speed, for instance, nor power....), but (and I know this isn't a common thought) they really don't "need" that.
I mean, I'd ideally have all my techniques precise, clean, accurate, deliberate, controlled, safe, and so on, but you can get away without all of that.. and having them be "fast, accurate, precise, powerful, effective and reliable" without having the surrounding tactical application, strategic methodology, awareness, timing, adrenaline-response-conditioning, and far more is completely pointless. You'd be hit/stabbed/whatever before you even got anywhere near your great technique.
The other thing is that sloppy technique wins all the damn time. Lucky shots end lots of fights. Sucker punches aren't technical, they're just a very successful application of a technique (the punch). Having great technique is wonderful, and as martial artists, I'd expect everyone is working on making their technique as good as they can... but, in reality, they're just not that important. Most really good, successful street fighters (for want of a better term) don't have lots of techniques... and they don't work on technique. They work on successful strategies. Or, more realistically, they find one (or two) that work, and rely on them 95%+ of the time.
No, I don't. Look, I get that this is not a common thing to hear when dealing with martial arts... but it's also the reality when it comes to actual violence.
Yeah... you've really missed the points I was making. All you've described there is what I was saying that, up to a point, technique is important (making sure you don't break your hand or thumb when you hit, for instance, or try choking by wrapping your arm around the chin instead of the neck), but, in order to get to the place where you can hit or choke in the first place is the actual important part. What you do after that is pretty well arbitrary, and will come down to experience, preference (yours and your trainings), and opportunity.
Read again. You've missed what was actually said.
More than you realize....