TFA quotes Lao Tzu:

   "The wise man knows he doesn’t know. The fool 
   doesn’t know he doesn’t know."

I'd add the wisdom of Bokonon[0] to that sentiment:

   "Beware of the man who works hard to learn 
   something, learns it, and finds himself no wiser 
   than before. He is full of murderous resentment 
   of people who are ignorant without having come 
   by their ignorance the hard way. "

I'd point out that "Hacker News Disease" as defined by the author is most certainly not limited to, nor did it begin with, tech discussion sites like HN.

It's becoming more widespread and the author wants to paint this as essentially the arrogance of the tech elites.

But that doesn't comport with all non-tech, non-elites who also engage in this sort of thing.

In fact, it's pretty much the same thing discussed by Tom Nichols in his 2017 book[1], The Death of Expertise. I recommend it.

[0] https://en.wikipedia.org/wiki/Cat's_Cradle

[1] https://en.wikipedia.org/wiki/The_Death_of_Expertise

Edit: Removed extraneous article.