Sure. I mean, that's what I did/do. But I also did lots of precise athletic training before hand, and I know from experience trying to "coach" people that there is a very big spread of people's proprioceptive abilities. You'd be surprised what some people can fail to notice about their own movements.

Besides which, if I had the time and money, I would absolutely hire a good quality strength and conditioning coach, and I bet I'd be kicking myself for not having done it earlier, since I've basically fixed all the things that I can notice and fix by introspection and film.

But basically I think we're in agreement on the big issues. :)