I’d compare college tuition to paying for a personal trainer at an athletic club. We professors play the roles of trainers, giving people access to the equipment (books, labs, our expertise) and after that, it is our job to be demanding.
The great thing about working out at a gym is that if you put in effort, you get very obvious results. The same should be true of college. A professor’s job is to teach students how to see their minds growing in the same way they can see their muscles grow when they look in a mirror.