>> learn 3x much being on my own
I doubt that. Part of it is the mindset of school. For 4 years of your life, you will have no other obligations than to focus and learn. It is "liberating" in the sense that you know you're there to improve your self and your talents.
You can buy textbooks, but you can't buy the experience of going to school and meeting a diverse set of interesting people your age.
For me, University was a formative stage of my life. I don't regret going at all. It also forces you to learn things that you may not have thought of learning, things that you learn to appreciate later.
You may not want to work at big corp now, but there may be a time when you have to sell-out, even for a short period of time out of pragmatism.