You wouldn't consider it to be immature to not do the right thing just because it was communicated in an unpleasant way that a 'self-respecting person' should have disdain for? I'm not talking about this particular article or defending immaturity, - I just don't see how your position is any better; more so it's just as unhumble as the 'rockstar position' since you would apparently be willing to write worse code just to avoid learning from someone that's an asshole.
A lot of people find that cockiness funny and find the informality welcoming. And many of those tend to find cold formality, fake humility or lack of self-confidence as signs of something being boring, uninteresting or outright creepy.
EDIT: Comment was edited, original:
It's hard to believe this came from a place of humor after reading the otherwise dry article. The article was otherwise fairly interesting, but that certainly left a sour taste in my mouth. He's lucky I read past the first paragraph, if it wasn't so prominent on HN I probably wouldn't have bothered listening to anything he had to say.The edit was because I only ended up scanning what I intended on reading and felt the second part of my criticism overly harsh.