I think it is the same reason rich people throw money after Adam Neumann post Wework. They know it is a con and wanna be part of it. They see themself as alpha-wolfes to badass to be losers. Compare to people that shill as true believers in different strange crypto Ponzi-schemes. They think they are in on it.

Being so good that you get in charge of YC, and not fired by PG at all, makes you perfect to meta-morph 'OpenAI' into some dystopian big corp, as seen.