Years ago I directed a dig in Canyon de Chelly, Arizona, where we retrieved exquisitely preserved material, including enough varied evidence of diet that we were able to do a pretty good reconstruction of their daily food intake. At the time, I thought, "they are not getting enough meat!" That when I was in my juicy hamburger phase, and I thought a nice steak the perfect ending to the day.

What they ate was pretty much what you describe -lots of veggies, with the occasional bit of meat - maybe 20% of the total caloric intake. One of our researchers (the gentleman who analyzed the recovered feces) tried living on their diet as we reconstructed it, and he thrived!

I think it is pretty clear that we should move our bods more, and eat less meat. I rarely eat hamburgers anymore.
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Geezer in Chief