Yeah you kind of have to assume that, in the depicted post-scarcity society, any “job” you see people doing is something they want to do. Like, Picard owns the vineyard or whatever but all those people in the fields might be people who like making wine and so Jean-Luc opens the land for them to do this.

Sisko’s dad has a restaurant in a society with replicators. Clearly this exists because he likes making food for groups of people.