Yes, the argument from "But this is how natural humans used to live!" Has spawned any number of misaprehemsions, not to mention a few fad diets. By all means,

Yes, the argument from "But this is how natural humans used to live!" Has spawned any number of misaprehemsions, not to mention a few fad diets. By all means, embrace food as eaten by out ancestors, if that's what someone really wants, but they should understand that such diets resulted in malnutrition and stunted growth, and we're "embraced" by our ancestors living on the brink of starvation & lack of choice.