Isn't posting and commenting on HN, at least in part, a product of longing to be part of an Inner Circle of hackers and Silicon Valley elites?
You could identify a set of people who are widely respected and listened to, but that's a different thing again from what Lewis is talking about. YC itself is arguably closer, but only tenuously connected in practice to HN social dynamics. I certainly couldn't tell you which members I pay attention to have been through YC (except for the ones who definitely haven't).
In other words, to comment on HN does not mean you are striving to be in the inner circle.