The article itself was a bit disappointing because it focused on political issues. In my opinion the strength of HN in this regard is that it is both a "sjw cesspool" and a "haven for alt-right", as evidenced by the fact that a comment on a controversial topic can easily float near zero points while raking in both upvotes and downvotes. And even those who refer to it as "the orange site" still come back and comment. In other words, HN may be an echo chamber but it is a pretty big one with a lot of voices in it.
I assume that the mass upvotes/downvotes are exactly that.
Lots of other commentators I've seen on here are experience pilots, engineers, etc. Maybe not Bill Gates money but certainly on the higher end of the bell-curve when it comes to education and pay.
I don't disagree that there is a lot of aspirational talk on here too -- they wanna get rich -- but again, it's the news site that's part of a startup incubator. What did you expect?