To your big point: that's great but we're talking about 16, 17, and 18 year old kids. They might be committed to Bama when they commit, but they change their minds. What about Justin Thomas this year? He was committed to the idea of WR or DB until he played the 2011 season at QB and decided that's where he wanted to play.
Did you date in high school? Were you committed to that girlfriend of yours? Still committed to her or did you change your mind a few months (or weeks) after you started dating?