Some people learn better when instructed, classes bring structure needed by all but the most self motivated, and some things are very difficult to learn without engaging with instructors and fellow students.

The thing university seems to do the most these days is weed out people that don’t have the resources or ability to navigate the game put together which doesn’t have that much to do any more with education. A liberal education was by definition intended to make one free, now university is quite a lot about initiating people into wage slavery by putting them in serious debt and only graduating people who are good enough at following rules in complicated somewhat pointless exercises. It is unclear if this process is shaping or shaped by our economy.