For science you simply will not have the resources to do anything worth a damn.
In math of course you can learn by yourself, but getting to learn
advanced shit by yourself is somewhat tricky when you do it for the first time.
Engineering and medicine is impossible to do without practice. Law needs people with accreditation.
For any humanities major, contrary to what
>>10973680 says, a college major has one advantage over learning everything by yourself and that is that you are obligated to defy your own beliefs. Many of the retards that claim to have learned philosophy by themselves, for instance, can't argue about it without showing it in their own, biased light.
For arts is largely useless, but I've got to admit that learning college arts may force them into producing more than shitty postmodern porn art for their twitter followers. I've found most people that "learned visual art by themselves" to be really shitty writers. I can admit that college cannot always change shit taste or shit analysis, just look at how many English majors are just female English teachers that love YA. But at least, again, may allow to contrast ideas and beliefs.
Also, the obvious:
>>10973687