There’s nothing wrong with these kind of diets, per se, it’s just that, well, I don’t think it’s a very good name.
After all, the Neanderthals DIED OUT.
They were outcompeted and were basically an evolutionary dead end. We survived because we developed different strategies for survival that were more adaptable to different environments. Then, eventually we created agriculture, which was a great leap forward in our ability to feed large groups.
In order to get the benefits from this so called “cave-man” diet, we depend on our ability to grow crops (maybe they should call it the “Bronze age” diet).
Basically, it’s a romantic misnomer for a diet consisting of good, healthy raw foods and quality proteins.
You don’t have to carry a spear and wear mammoth skins to get the benefits of that.
In the end, it’s all marketing.