Yes...but, in the bigger picture: For self-absorbed, A-list young billionaires, the educational outcomes for the little kids were never all that important. Their never-miss-it-anyway $1e8 bought boatloads of arbitrary power over little people, ~8 years of favorable PR, cool talking points when hanging out with their uber-rich social set, and other things that were valuable to them.

I'll admit that there's a flip-side viewpoint here: If you're a billionaire, in a society that very obviously has a lot of problems, and all you've got for tools and skills is a billion-dollar hammer that you're real handy with...well, okay - try hitting some things with your hammer. When the world is screwed up badly enough, even kinda-clueless change has a decent chance of improving something...right?

I suspect most humans with a billion dollars under their belt would be quite inclined to believe they can succeed where others have failed. After all, most people "fail" to become billionaires like they did.

Yes...but your phrasing suggests that is a rational belief. Vs. I'd attribute it far more to over-inflated self-esteem. Anybody who is both rational and has made it to billionaire has failed many times, at a wide variety of things. And knows the world is vastly more complex than any human actually understands.