@helene
i think at least for europeans it is healthy if it is not treated in all kinds of way, like half fat homogenized ultra-heated.
gut biome and genetics were selected for millennia to digest animal milk and things like cheese, because it was a very important source of food here. my diet is to a big part things from milk with much fat and i feel shitty if i "eat healthy vegan stuff" instead.
of course the milk should be from a good regional source with cows eating good things not 100% corn or stuff like that.
companies lobbying to mandatorily have diary products in school cafeteria, pushing a lot of ads on TV and disguising themselves as state health warnings, etc
milk and dairy are fine, i like cheese, yogurt, milk of course but there's a clear issue with the companies producing those products doing very fishy stuff