That's an interesting quesiton. The college football coach has a responsibility to his school and his family. The school hired him to win games, his family needs him to bring home the bacon. So winning games, within the rules, has to be his first priority. With that said, it's easier to win games with top athletes. If you develop a rep of not getting players pro-ready, they'll go somewhere else if that's their goal. That's why I'm kind of surprised that Tebow was allowed to just win games while keeping the same crappy throwing habits. Unless, of course, Meyer is just about done coaching.
I think Tebow would have been able to continue to play well and learn. Of course, it's just as much his fault for not seeking to improve his technique. There are all sorts of QB schools/coaches who specialize in that sort of thing.