"We" in this case is actually those human cultures with large backgrounds in herding. For example the Maasai, Kenyans, Tanzanians, and Sudanese tend to not be

"We" in this case is actually those human cultures with large backgrounds in herding. For example the Maasai, Kenyans, Tanzanians, and Sudanese tend to not be lactose intolerant. I think we'd agree they're not Northern Europeans. That being said, yes it's not a global norm.