The NCAA is an equal opportunity rip-off organization, it’s just that the black athletes have a higher overall profile. The idea that all funds brought in by revenue producing sports are kept for the coaches and schools etc is the same issue that was addressed long ago by the IAAF.
That said, there is no reason why athletes on scholarship can’t use their time wisely and leave with a degree, for whatever the motivation is, if a door is opened to you, go through it!!