Because teachers in colleges and universities are usually busy, most class teachers educate juniors to be familiar with college life and study through some excellent senior students, which plays a temporary role and makes juniors adapt to the new environment and study life better and faster.
There is a difference between a head teacher in a university and a head teacher in a middle school. It is more about guiding your professional study and moral character than managing your personal life and even involving your privacy. Because college students are independent adults, the class teacher respects your personal opinions and serves students more than management.