Well, if they are introducing puma, then sooner or later, things will balance out. NY has quite a few [s]hunger[/s] too many people, though, so it wouldn't be a bad idea to have pumas harvest that meat, turn a problem into a solution, ya know.
Humans and food plant have co-evolved for thousands of years. Wild humans haven't been around for a while; even the few remaining modern hunters and gatherers have trade relationships with agriculturalists. And the human population was pretty low back then.
FWIW, the genie is out of the bottle and many food plants (and weeds) have already been spread everywhere they will grow. I don't think this is a bad thing; I grow plants from all over all mixed together. Confuses the heck out of the pests.....
When humans first arrived in Hawaii, the only edible plants were some raspberries that birds had introduced and a few coconuts that had washed up on the beach. And the native plants don't compete well; the ecosystem was isolated, and there weren't any large herbivores.
All the plants that humans eat were introduced from somewhere, and have been bred and selected, sometimes for thousands of years. Permaculture is supposed to be permanent agriculture, not a reversion to hunting and gathering.