The fans of college football (i.e., the people who are the source of all the money the system makes) don't care about the athletes. They care about their favorite school. Yes, the players have some economic value in the system, but the overwhelming majority of the economic value comes from the school logos. That's why you could take the top 500 high school football players every year and put them in an actual minor league, and that minor league wouldn't make a dime, while CFB would still be raking in the dough.