Job is something about you that others find valuable enough to pay for. So for AI to replace jobs we have to like it enough to spend our lives in separate holodecks, assuming human reproduction and young child care are somehow taken care of or we don't mind going extinct in a generation.

Seems far fetched, and also from a utilitarian point of view some will say it's Ok as long as everyone is really happy. But in every other scenario, there will be jobs. They just may not look like jobs we are used to now or require same training as required now. They may be jobs that people enjoy doing, or that people enjoy being done by people for whatever the reason. Someone who lived centuries ago would not recognize our jobs as jobs either. And maybe if someone wants to just sit in a holodeck and be fed, we will take care of it for them for the sake of global peace and quiet. For example, let criminals do whatever they want in VR, including commit crimes, cheaper than the rest of us suffering crime IRL.