I don't understand -- you had a bad reaction to a single line in the introductory paragraph and knowingly let this turn you off to the entire post? Is that a valuable type of filter for you?
It's a bad way to respond to an argument, because it subtly undermines everyone who is critical of Silicon Valley. They either don't build things (and they're unqualified to have an opinion) or they do build things (but they're being brushed aside because they're a minority).
