How about water ads? Can you specifically address how water isn't good for us, leaving aside absurd arguments such as "drink too much, and you'll drown!"

[1] https://en.prostozkranu.krakow.pl

Then, what it does it actually means to be good for you? Clearly, people consumme milk/vegetable milk because they like the taste of it and not because it's healthy.

I mean, milk is completely dispensable and some people can't digest it but it's not particularly bad either. It gots sugar and fat, a lot of calcium, not a panacea but nothing particularly awful. You could do worse. The issue mostly boils down to how it's produced.

Meanwhile, nutritionally speaking, most vegetable milks end up in the same dispensable category as far as I'm concerned. Oat milk for exemple is mostly water, sugar and supplements. I think soy milk does better protein wise but not by much.

"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.

Is this true ? I’ve understood milk is for babies and adults don’t need it

They also live a mainly active, nomadic lifestyle herding cows rather than sitting down staring at a computer screen - and usually die in their forties.