Look at it from his standpoint. He has an untold amount of people vying for his attention, comments that hopefully are managed by a 3rd party/other folks, and who knows quantity of people contacting him with ideas for a story, video, or some such. I don't even know if he still even runs or manages his repair business at all at this point. When you combine all those things, you end up getting into a mindset of filtering out what matters to you and/or others very quickly and having little time for much else especially if people wax on and are not good at getting to the point.
I get that HN isn't Reddit in the sense that you don't see long form comments like this, but I've dealt with this a lot in the Information Security industry. I think that's what may separate people who get shit done from infosec rockstars and other folks who talk a big talk, but when you get to know them, they are deep down, jerks. I could share my own stories of Deviant Ollam, JohnnyXm4s or other individuals -- but how much of that is my own bias and frustration with what I did, or did not get when interacting with those people? It does not make them assholes just because I did not get the experience I expected.