We just don't need guys on an assembly line tightening the same bolt ten thousand times a day for forty years, like my grandfather did (true story.)
I would argue that we do need that.
You don't take a child straight from the womb to an r-rated movie, nor do you put a small plant start right into a torrent of rain. Living things need an environment and activities that match their lifecycle.
A society is also a living thing and has strata that are at different points in that continuum ... and if there is nothing appropriate for that strata, that strata will stagnate and die.
So when people look ahead to some golden utopia where we all work half time as knowledge workers and spend the other half on philosophy or maker projects, they ignore the fact that some sect of a society will not have the makeup for that.
You need to have something for them. Your society needs to have depth and breadth.