Similarly to how we removed a lot of workforce from agriculture in the last century. The breadth and scope of services offered increased ten-fold and workers learned to add value in different ways in these new areas.
Gutting a ton of jobs across many sectors in the economy won't change demand for food or rent, but will likely hurt every service sector and slow the economy down overall as people without jobs push out purchases they would have made otherwise.
The previous generations could never imagine the kinds of jobs we have today.
Now I am not saying that this is a guarantee to happen again, and that new jobs will be created and such. But I think anyone claiming to know that "this time it will be different" and that "we wont create new jobs that we can't imagine today" could be just as wrong about that idea too.