Also, education has many benefits beyond earning money. It's seems absurdly narrow-minded to evaluate college solely by the marginal income gain. Life is so much more and education benefits much of it. I could not write nearly as well, use mathematics, understand science, understand art, understand humanity, be as creative, etc. etc. without the years I spent studying those things.
I can't imagine doing what I do with my high school education. Can someone waste their time in college? Of course and I'm sorry for those that did, but don't impose it on everyone else. I remember most of my peers' intellectual curiosity and how much they learned. Someone could own a computer or raise kids and gain nothing from those things either, but that doesn't devalue my computer or family, or argue that they don't provide great benefits to humanity.