Could be a technology advance that encouraged this anti-alcohol gene to get a foothold. Living in yurts and drinking fermented mares milk probably served to kill off all the folks who persisted in letting it get "too fermented". Must be a gazillion diseases that just love mares milk.
There are quite a few instances of Russian octogenarians and higher that cite a yogurt, vodka and cigarette diet.
?
Maybe not.
Feta Cheese Made From Raw Milk Has Natural Anti-food-poisoning Properties