Or we could act based on actual scientific evidence instead of vaguely trying to approximate what our ancestors ate in a blind appeal to nature.

The thing really gets to me about it is that in addition to being based on fallacious thinking, the approximation is so selective. How can we equate a paleolithic human spending a day catching fish to a modern human buying a fish at the supermarket?

And don't even get me started on coconut. Getting to the meat of a coconut in the paleolithic era was a time intensive (and calorie burning) process that bears little resemblance to opening the jar of hexane-extracted coconut oil you bought at the health food store.