I think it’s partially because of the nature of VCs (which is partially why I’d never use a vc but rather bootstrap and fail). If your parent organisation’s goal is a 100x return you don’t mind 9/10 startups burning up in an attempt.

YC in that sense is a full “all guns blazing” thing. It’s generally younger folks who don’t mind eating ramen and don’t have to take care of a large family, and hence are more likely to go into a startup full time. Combine these two and I think you see what I mean.

Btw this isn’t a new criticism of YC/VCs, it’s something that’s been around for a while.