Mostly agree, but don't think they got it completely right (you've seen me argue this before).
There's the notion, shared among anthropologists and reactionaries, that cultural evolution is not arbitrary; it optimizes for something. And so we should often deploy the Chesterton's fence heuristic when critiquing received wisdom. And you probably know, there is a reason (beyond "that's racist") anthropologists are skeptical of Western "civilizing" logic--their field teaches them that important knowledge is tied up in culture and individual reason is not as good at outsmarting that as we'd like to think. Some anthropologists will take this argument to the extreme and argue individual reason is actually pretty much useless compared to cultural evolution (I disagree with this, but you get the point).
There are a lot of examples. Many agrarian societies developed the practice of consuming carbs with fats/oils, which turns out to be very healthy because it reduces glycemic response--even though no one had any idea what blood sugar was and no Enlightenment thinker was going to figure that out through reason. Many spices have anti-microbial properties and spices are more common in areas with more pathogens (areas closer to the equator). No one survives in the arctic or the desert without culture. I recently read about an Indonesian farming ritual that incidentally controlled pests, but it was abandoned at the urging of the government, which caused crop losses because the insect population surged.