>Isn't one of the primary criticisms of modern startups that they abuse naive fresh-out-of-college graduates?

Precisely. A 20 year old should go out and get a job and gain some experience in a space and then, maybe, they'll be able to identify and solve a real-world problem.

I had very little sense as a 20 year old. And yet, judging by some of the articles I read here, I was positively worldly compared to some of the kids who are getting big money and starting companies. I have a hard time coming to terms with why seemingly sensible adults think this is a good idea.