No. There are many ideas that go into the Paleo diets which have many variations from vegan to pure carnivore, but mostly it is a reaction to some modern engineered foods not being ideal for human digestion. Marshmallows fried in Crisco is not a traditional food and eating such things has unknown effects. The we don't know exactly what people ate or how they cooked it argument has at best meager relevance. We actually have quite a bit of information about that as well as what foods have been recently engineered using modern technology.