Now for sure, but before Europeans arrived there was ~30 billion pounds of bison on the hoof in the central plains, and now there is ~4 billion pounds of deer in the US which is probably far more than there was before european settlement. A sustainable annual harvest might be 20% so it starts to add up. If we could go back in time and manage our fisheries properly and not pollute places like Chesapeake bay and the great lakes with agricultural run-off, there might be billions more pounds of wild fish, oysters, crab, lobsters, etc, to eat.
It's an interesting thought anyways, how many people could have been fed sustainably a healthy amount of meat protein on the natural food systems of north america before we wrecked most of them? Probably close to the full 370 million of us if we weren't too picky on what the protein is... I bet Passenger Pigeon tasted a little like chicken...
There were economists who said the only way to make things sustainable is to have a dictator or large business empire to own everything locally. That way the same business destroying the forest with oil extraction would be destroying their fish sources, and the same farm which releases these toxins to the water would be destroying their own water front properties downstream.
40% of our food production is discarded, but enough people want PERFECT food that you have to over produce to get these into the system. You really have to pick a balance between being no waste or not affordable. Or if you have good relationship with other nations in different climate maybe you can ship them around the globe to reduce food waste, by increasing fuel waste.
I would never though that I would say this when I grow up: all you can eat buffet is actually not that wasteful, if managed correctly people finish their food and only cook something that is affordable (i.e. less waste, locally sourced, over produced for the season).