Peas != extracted pea protein
They're not the same thing.
I do agree that wild meat is probably a lot healthier than modern industrially farmed meat. Just as wild plants are probably often a lot healthier than modern monocropped plants grown with synthetic fertilizers rather than healthy soil.
Not to mention all cooking really is is a bunch of refinement, extraction, chemical reaction, and heating processes anyway. I refine & extract & process in my kitchen all the time, including separating protein in milk (cheeses) or wheat flour (chaap, seitan, or for the starch) for example.
Your point on cooking is fair. And, I'd still argue that modern processes introduce new types of chemistry that didn't exist in human food until very recently.