"the hard-core paleos eat almost purely meat and vegetables"
Wrong! wrong wrong wrong.
All of the vegetables available are neolithic, so impossible that they could be paleo.
WE have used the scientific method to make a best guess at the true paleo diet, and it is pemmican and wild greens.
Healthy human bodies are made of these essential fatty acids and proteins, with some alkalizing stuff from the greens. And all raw.
Yes, your body is raw.
Fruit was seasonal. Paleo fruit does not taste good, and contains antinutrients.