I don't know. What percentage of HN commenters really have serious aspirations for being a YC founder? 0.01%? 0.001%? Im not sure "What will YC think of me" is really that much of a driver of commenting behavior here.

People simp for billionaires all over the web, not just on HN. I've never understood it, and I probably never will. But, there are enough of them and their billionaire-defense commentary pops up everywhere. Not to mention the obvious downvote rings that will hit you if you ever insult one of a few key billionaires with large followings. This is widespread behavior and not about wanting to be a startup founder.

That's a good question. Probably a low percentage but with the amount of people on HN that still adds up to a sizeable number of participants.