I get the feeling only very affluent and well-supported people follow this path, and they probably don't need THiel's money to do it. The vast majority don't have a few years at this stage of their life to play the lottery.

Yeah, I hung out with one of the early batches of these people (my former supervisor was involved) and would agree that they tended to be from better off families. How much of that was the Ivy league selection bias vs anything else I dunno though.