Mark Zuckerberg is a particularly bad example, since he was the son of two white-collar professionals, went to an elite private school (Phillips Exeter) for two years, and then went to Harvard. He was probably eligible for little to no finanical aid, so it's likely his parents paid for almost all of his education. Zuckerberg's father also hired a professional software developer to privately tutor him.
There are obviously exceptions, but from what I've seen most tech billionaires have these kinds of backgrounds.
There are obviously exceptions, but from what I've seen most tech billionaires have these kinds of backgrounds.