I think this article just reflects the worldview of a 40something career DC bureaucrat, I'm sure much or all of this advice is relevant to someone living that life. I personally just have little in common with the author, other than living in a major city. I'm guessing much of HN doesn't have much in common with him either.

With that being said, some of the advice (like about not trading time for money) is pretty relevant for upper middle-class tech professionals too