I have noticed the same thing, but I still think it's an interesting question. It would be strange for me to have a close friend and never have any kind of curiosity about how they spend nearly half of their waking hours. We don't live in severance-world: understanding someone's vocation feels like part of understanding them as a person.

I guess if you live in a community where most people do sort of menial interchangeable jobs then it's probably different, maybe everyone has a job as an unfortunate necessity but would rather think and talk about it as little as possible.