A Stanford HC Bill Walsh saying negative things about his QB (can't see that happening by the way) would raise suspicions with NFL GM's and coaches. Or good things.
With BK, you'd think people would "consider the source" and take the opposite side of the bet
As far as my opinion, when I read analysts say that, at his best, Kizer is the best QB. It's the "at his worse" analysis that is spooky. I believe Kizer's NFL development will be dependent on his coach and team situation. If he can get the right coach and a solid franchise, he's got a real shot at being a very good NFL QB. If he were to land in Jacksonville, he's likely toast