I remember watching some bewitched reruns and they only had a few plots.
- Husband doesn’t want wife to use witchcraft ever
- Husband wants to be the breadwinner and doesn’t want any magical help with his career. By the way his job is in advertising which is useless and stupid so why would he care?
- Wife’s in laws hate husband and make problems for him using magic in some way
- Nosey neighbor keeps seeing strange things but nobody believes her
It’s a comedy so nobody ever thinks to use magic in a way to help society or something, so that’s ok. But it’s very noticeable how mundane the plots are. Also I think there were a few other old shows where the characters were in the advertising business or television business. I bet this was done to pander to the people who were paying for the show.
I think the characters are in those careers commonly because it’s what the writers know.
Close but it’s because if the husband is an advertiser, then it’s REALLY easy to slip product placements in. It was part of the transition from the actors just blatantly looking at the screen and advertising the product to making it more subtle.