It's really the self-confidence of a successful person. He doesn't need to prove anything to anyone at this point, so he's unafraid of criticism. There was another submission here recently ("Find Your People") that touched on that: be immune to rejection.
> ... he writes mostly to justify his luck in amassing capital as something of intellectual consequence.
Strange take, given PG made his billions from actually building something of immense consequence (YC) & provably codifying a blueprint on building fast-growing companies in SV.
If PG was a prof at HBS, it is likely he'd be considered in the same bracket as Clayton Christensen.
