Early human ancestors didn’t regularly eat meat

Yeah makes sense. Gaining the ability to hunt and eat meat is what allowed homo sapiens to evolve according to the article. That ability to reliably have food by being an omnivore would have been a boon to development rather that being tied to the growth cycle of the local plant life, and the protein boost too.

Just as slaves and poor people through history. Something that have more to do with availability than preference or healthcare.

I mean I don't think we have to go all that far back for meat eating to be way less than today with the possible exception of fish. I mean civilization was basically built on fish and grains.