Now I want to ask this: After all of these years of eating meat, wouldn't our bodies evolve wider teeth, an intestinal track that process meat better, a stomach with more acid, and saliva glands that adhere to meat eaters? Instead, our bodies can get heart disease from eating to much red meat.
From an evolutionary viewpoint, humans are omnivores; neither strictly vegetarian nor carnivorous.
The key, as you may perhaps be intimating, is in our dentition. We have incisors and molars for dealing with roots and grains, but we also have, (drum-roll please), canines.
Just from this survey, it would appear that we are “intended” to consume a modest amount of meat, during at least some times, perhaps of hardship, but that most of our diet should not be “fast food”.