I have never understood this sentiment about the classes only being a small part. To me the classes were the only thing of value. Not once did I engage with any classmates outside of class on any academic subject. There was no scholarly learning or discussion. I did have those with professors during class or office hours. The availability tutors was beneficial. Most of the rest I felt was a distraction and a waste of time. There was no network to develop. I am not in contact with a single person I went to college with. It may work for some, but most of my colleagues say very similar things.