This seems to me a very apt time for the age-old Slashdot comment "the plural of anecdote is not data". Sounds like you've done great, provided you're not full of shit (and I have no reason to believe you are). But there are many, many people on benefits, in Burger King or in a call-center who had the same idea. Some of them are probably brighter, more motivated, better-looking and (God forbid) less full of themselves than you are.
No-one is saying that you can't leave school at 7 and make a success of your life, no-one is saying that you can't be a complete, well-rounded person without a college degree and I hope very much no-one is saying that going to college somehow makes you a "better" person.
I think the point is that education is the great leveler. Not everyone has a goal at 15, not everyone has a passion. Not everyone has unfettered access to computers and the internet. Some kids are looking after sick parents or siblings or working to supplement the family income or whatever. Going to college places a person in an environment where learning (and self-learning, believe it or not) is encouraged. It gives everyone the same access to technology, resources, books, information. It can be an inspirational experience if treated with the respect it deserves.
It's also the best way right now for people to pretty much guarantee themselves a lifetime of earnings above the median. This doesn't hold so true if you get a bachelor degree in creating cardboard cutouts of famous dogs or something, but if you choose the right degree at the right institution it gives you a leg up.
Congratulations on your successes...I make a steady living in IT and I reckon I could make a lot more if I setup by myself, but I'm a coward and as such my degree is a safety net. I've leveraged it into a good career which affords a lifestyle that would be the envy of probably 95% of the world's population.
This was always the likely outcome. If I'd quit school early I could well have far more material wealth and a far better lifestyle but I could also be the guy who cleans one of your many, many swimming pools. I think the probability is skewed well towards the latter of those two option.s