Earlier quoted context omitted.
It's always been bad for you.
Tell that to the Massai, that live basically on a diet of milk, meat and blood. Just because you wish it to be bad it doesn't change reality my dude.
"Lactase nonpersistence is most prevalent in people of East Asian descent, with 70 to 100 percent of people affected in these communities."
Masai herdsmen are East Africans; so I find that statistic bewildering. "Lactase nonpersistence" means the decline of the production of the enzyme lactase beyond infancy. I don't know whether lactase nonpersistence is equivalent to lactose intolerance.