Its irrelevant if you can provide for yourself. The ecosystem cannot support 9 billion Hunter gatherers - period. Subsistence level agriculture is also wildly inefficient and so again: the ecosystem cannot support it.
A hunter-gatherer dropped into a metropolis where all the logistics has suddenly failed would be as dead as everybody else.
> Its irrelevant if you can provide for yourself. The ecosystem cannot support 9 billion Hunter gatherers - period.
I didn’t suggest that it could, but the number that it can support is certainly more than zero. If that’s the only choice in a hypothetical scenario where global infrastructure goes kablooey, then people who can figure out how to provide for themselves will outlive those who can’t. From there it’s natural selection.