I theorize this is due to the overall startup versus incumbents focus as well as the hacker ethos of being opposed to more buttoned up closed systems meant for the general public. Like for example recent posts on EU regulation of Apple get generally favorable reactions and little analysis of actual consumer experience impact, of which Gruber is more keenly analytical.
E.g. most of us on HN would generally appreciate having opt-in side loading and whatnot onto our Apple devices, like macOS. So Gruber just sounds like some kind of apologist when he says this would hurt consumers in the large. We more advanced hacker types are quick to say PEBKAC.
But it’s a shame because his analysis actually offers really good insight in how to build successful consumer products the Apple way.