I think you are taking an unfortunate shorthand statement as a detailed analysis. It aint.

I don't think there will soon be guards outside of factories to fend off the hordes of humans wanting something to do. What I think will happen is that capitalism, as implemented in the current idiom, will cease to be a desirable influence. The book, Bullshit Jobs by David Graeber should help understanding my position. For those that just have to go to a place and do a thing, that will remain an option. But no one will indulge them in their fantasy that human society or environment actually needs them to go to a place and do a thing.

As a general rule, all of evolution is reactionary. Something changed whether anything wanted it to change or not and the evolution is the response to that change. We will evolve away from jobs because shit will change - whether we want that change or not.