Most of us eat enough meat, and more, as we would need if we had jobs that are mostly manual labor although we actually have jobs that are mostly pushing paper & clicking mouses. (That doesn’t apply to domestic work, obviously) I think many of us don’t consider our diets to be products of history — meat used to be sign that someone had achieved enough wealth to elevate them out of the majority. Now we in the USA have poor people who are, on average, more obese than average. Culture passed on as habits learned from childhood is the biggest barrier to diets that reflect reality. There’s at least 4 preceding comments that try to rationalize their behavior.