Those are good questions. I'll be interested in hearing the answers
In a lot of the best Power Five D1 programs, the reality is that a college commitment is an invitation to battle for playing time & even a roster spot as a college freshman. I would suggest that a vast majority of high school kids have no clue what they are getting themselves into, especially the kids who have never faced adversity or had to battle for a spot throughout their High School/youth "careers".
A lot of the top players have been handed things their whole lives and are told how great they are over & over again... It can be an eye opening experience