I'm still at uni and have shared houses with people training to be teachers, on a specific degree course, and have spent a fair amount of time socialising which other people on their course. Most the trainee teachers lack the ability to state opinion as that, opinions. And will argue even a point to the end if they think its correct even if suitable evidence suggest otherwise. I know this is not true for all teachers but from the trainee teachers I have met a saying springs to mind, those who can't teach (and those who can't teach, teach PE)