Their "job" was to hunt/gather, make primitive tools, and build shelter. You're welcome to go into the forest and do that (well, you'd be arrested!).
Should this be the case? Should we permit society to expand to a point in which it's impossible for people to opt-out?
I'm not comfortable with requiring all humans to be a part of society, but at the same time I'm not sure if there's a solution given the fact that resources are finite.