Just wildly incorrect. https://www.webmd.com/diet/health-benefits-of-whole-grain-pa...
Sure it might be better to avoid milled grains, but if you do, (the vast vast majority of people don't avoid them) they should be whole or brown.
What's more, if you're talking ancestral diet, it should certainly includes grains like wild rice, whole barley, rough milled wheat, farro, and quinoa.