I know a welder who makes cool stuff like grills and roasters in his spare time for fun.
Plenty of photographers don't even pretend there is a difference between work and play.
Same for musicians.
Mathematicians don't make math jokes all the time, but the annoyingly approach everything as if it was a math problem (insert spherical cow joke here).
On the other side: this guy has had the luckiest interactions with the bureaucrats ever. I seem to always get met with derision and snide comments for asking things like "how do i turn this in?" or "this vaguely labeled field doesn't make sense, what do you want here" and so on.
I've heard accountants throw around jargon as bad or worse than programmers, particularly during tax season.
Lawyers love lawyer jokes and lawyer culture.
So what the hell is this guy's problem? Why doesn't he just quit and do something he likes instead of whine about it like a petulant child?