Stanford has the option of behaving like you say, but in practice they are actually maintaining a higher entrance standard for athletes than other Pac-12 schools.
USC, on the other hand...
I know for a fact that a couple years before Monty left Furd he went to the admin and basically said if you want to do anything more than just get to the tournament on a consistent basis you are going to need to loosen up the admissions for a few select players. In that specific season 1 of the top 200 players in the country was goign to survive admissions. They basically said - you are already doing pretty well with our current standards we don't believe you, sorry. A couple years later he left.