I don't think a _job_ is the quintessential experience so much as _productive value,_ doing something that brings you joy from the act of creating, whether it's making music or art, assembling Lego kits, antique engine restoration, etc. Getting that satisfaction from your job is totally possible, so perhaps to some people it is!

As far as crafting a post-scarcity economic model goes, it's not the problem of dreaming one up, it's the pervasiveness of scarcity. Even if all of humanity's basic necessities are one day a given, scarcity won't disappear, just shift around (maybe as transportation for the otherwise-infinite supply of consumer goods? Or living space away from dense urban centers? Maybe even the kind of heuristic analysis abilities humans are unmatched in to keep the matter replicators functioning?)

More to the point, saying that this kind of luxury will exist in a thousand years doesn't nullify the concerns of the present, and probably wouldn't convince most people to forfeit their employment to machines likely owned by the uppermost classes.