Hercules, Zeus, and other mythical figures were brought up on goat milk and honey.
Milk is a recommended food for yogis, at least in India.
Sivananda recommended to observe a diet of milk and fruits only, for a week, in his teachings regarding bhakti yoga.
Probably lactose intolerance is not a charactersistic of the indian genotype. Personally, I am lactose intolerant. I do enjoy dairy where the lactose is transfromed into lactic acid, through fermentation, like cheese and yogurt.
Beside that, my experience is that dairy reduces the flow of lymph in my body, thus giving a hard time to my immune system … it has an inflammatory effect. But all comes down to quantity, and other foods I consume it with. Small quantieties have little or not noticable effects. This is through only for cow’s milk though. The milk of smaller mammals contains less cazein, and does not burden the lymphatic system that much. (Goat milk is used in some hospitals as an easier substitue for cow’s milk)
Other problem with dairy is it’s proteins. They are animal proteins, with not very good phosphor-calcium ratio, meaning that they contain hundredfolds more phosphor then calcium, and the extra phosphor is eliminated as calcium-phoshpate. That’s why recommending dairy for it’s high calcium content is futile, because it brings a lot, but also takes a lot.
Another thing is that, dairy, especially soft cheese, butter, cream is full of saturated fats, and some of it, in the case of cheeses went trhough natural oxidation, transfroming them into TRANS fat. It is known that fresh saturated fats have little effect on our arteries, yet oxidated ones make the artery cells calcify and literally, die.
If your diet is dairy heavy, you should try to reduce it. Moderate, fresh dairy is not that harmful. The body has it’s ways to deal with any food … all foods except fresh fruits and vegetables have unhelathy effects, but we need to find our balance being a solitary hermit, and a social being. 