I think you do it on a case by case basis.
If you know your pg averages 3.1 fouls in 34 minutes of play, you leave him in. If he's your center that averages 4.2 fouls in 19 minutes of play, you sit him.
Same, but not for the same reason (maybe).
THe university's primary and sole focus should be on genuine education, that of the athletics departments turning boys into men through sport and competition getting the most out of them, in preparing them for success, not for profit nonsense agendas...