They demonstrate the truth that humans evolved as opportunistic hunter-gatherer-scavengers who can survive comfortably on a huge range of diets, so anyone selli

They demonstrate the truth that humans evolved as opportunistic hunter-gatherer-scavengers who can survive comfortably on a huge range of diets, so anyone selling any particular narrowly defined diet--like "Paleo"--as in any way particularly "natural" to humans is in a state of evolution-denial that would make the average Creationist proud.