It may be worth pointing out that pg could have some interest in what's being said here, though I don't by any means think that's his motive. Since YC takes equity before stage 2, it's much better for YC if investors over-invest in startups, since that'll improve their chances of winning.

I actually think he's more likely to simply care a lot about making life better for founders, though. He may care about investors too, but I warrant it's less.