If you really want to see how the average liberal would fare living fending for themselves, living off the grid, watch a few episodes of “Naked and Afraid”.
Even the ones that claim to know all about hunting, fishing, trapping, building a fire, shelter, know nothing about it.
Most of them survive by drinking water and starving for 21 days.
I can only think of a couple that could survive long term if need be.
Most are dumbasses that don’t have a clue.
In most localities, it is very difficult to “live off the land”.
Most armies “lived off the land” by plunder and pillage.
Agriculture became a “thing” for a reason.
Without manmade fertilizer, the carrying capacity of the earth, for people, drops by 75%.