Our ancestors needed dopamine reward systems to encourage them to hunt and to kill. It is how they survived to produce us. It is baked into our DNA. It’s in their blood.

That’s very speculative, and indistinguishable from the texas sharpshoorter fallacy.
Humans are opportunistic omnivores, first and foremost, and gained a huge advantage being able to do endurance hunting. We have better energy management and less prone to overheating. Which means it’s equally (if not more) valid to say that humans were designed to eat roadkill that we find on the side of the road. Doesn’t sound as badass now.
But since people notoriously can’t survive on meat alone, but can survive and thrive on plant-based diet, walking around and picking everything that smells good is in our blood, if there is anything there at all