"I don’t think I can supply you with any proof that will make you change your mind but I do have quite a few friends who are professors and based on what they tell me and what their colleagues talk about with each other, they believe that undergraduate admissions lets too many students in that shouldn’t be there in their classes. They are often frustrated at the amount of remedial work required and the fact that they have to sometimes adjust the class pace to cater to some of these students. "
So what prevents your professor friends from going and offering their services pro-bono to help out the adcoms, or sit on a committee to help the adcoms pick the “right” students? Oh that’s right, too important and busy! Complain but do nothing about it!