How is it not a job? They aren’t acting for fun. They aren’t amateurs.

I misread, you said not “just” a job. The rest of my response still applies.

In every job there are people who are passionate about it and take the work back home - but they don’t consider it work because it was their hobby / passion to begin with. There are teachers who will go continue going to conferences, get certificates, take additional courses, stay up to date on the latest pedagogic research, and so on. Same for midwives, engineers, wood-workers, bricklayers, and so on.

For many, the vast majority I’d say, a job is a job. You go in, do the work, get paid, get out, and move on to another activity after work.