Not just meat, every food you see today didn't exist before agricultural age (10,000 years ago).
You can't eat natural banana, it is hard, small, has a lot seed, has adstringent taste(poison). Monkeys wouldn't eat it unless they have no other option.
Wild apple is sour, small, thick skin. Human made it dilicious.
You eat wheat and grain? Wild wheat and grain are small, hard, taste like sand with brown color. It doesn't produce much on each shot.
Let's talk about salmon, wild salmon is small, contains bacterial, doesn't taste nice(because it has to keep swimming from predator, therefore it doesn't have much fat.)
Wild pig, ox, sheep? They stink and muscular meat is as hard as rubber tire.
These animals and plants main goal is to survive, not become human's food. During the evolution, they generate protect machenism to make them less edible.
Natural food sucks, that's why we add artificial ingredients or modify their DNA to make them better.
Sorry about my poor English.
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