Well, academic philosophy is a rather sophomoric discipline. The non-sophomoric parts of it have long since moved to other departments - PG even has an essay about this http://www.paulgraham.com/philosophy.html
Why would the opinion of a VC who dropped out of an undergrad philosophy program be an especially authoritative or notable on this topic? Some tech people have an annoying habit of shitting on anything that isn't tech or tech-adjacent, and if anything, that essay seems to play into those biases.