It’s not that challenging with a partner to help manage infrastructure which even at his scale is not going to cost an obscene amount of money.
Edit: there’s a very massive difference between a single content creator hosting their content and a site hosting everyone’s content like YouTube as well in terms of cost, infrastructure, security and management.
“We are making more money than ever but the parents want to spend everything on AI so gotta let you go and ruin our chance to have good first party studios, sorry”