That is what I was saying too. I wasn't being direct though.
Yes he is defending against a strawman to bolster his position and to justify and bring context to a certain narrative that revoles around startups. It makes sense to create these PR stories so to speak, masked as simple blog posts, to provide conext and interpretation for those who follow him.
I think in this case there was a need to have an explanation of how start world relates to income inequality. At some point someone is going to confront some YC company founders after they talked about they want to save the world and make it a better palce etc etc, about "so what do you think about income inequality" and the idea is they'll pull the the gosspel -- pg essay ;-) and quote from the book of Econ chapter 2 verse 15.
Defending against a strawman isn't really defending against anything but rather perpetuating the delusion that the strawman is real.
It isn't helpful or productive.