Your grandkids may very well experience climate-related famine, but hopefully they'll find solace in their parents being a few cm taller than the lactose intolerant.
This is a little bit of a ridiculous way to approach nutrition. My point is that very few people actually need cow's milk to the extent that the dairy industry would lead you to believe. A few cm does not negate that. Compared to most of human history we live in a time of nutritional abundance.
