This is very outdated. In fact, undergrad life has been a real focus in recent years, not only academically but in terms of dorm life and common social spaces.
Harvard has a system whereby lectures are given by professors and grad student teaching fellows lead “sections” for discussion. TF’s/TA’s are common at many universities. If you want a class taught entirely by a professor, look at liberal arts colleges or ask questions at the universities and colleges you visit.