I think a major hole in these kind of studies is the use of "milk" as an all encompassing term. Unpasteurized, unprocessed milk from local grass fed cows is medicine, pure and simple. You can heal yourself with raw milk and raw egg yolks - doctors used this "therapy" a hundred years ago before pharma stepped in to make a buck off of us.
The stuff in groceries (even the organic) is grey and tastes terrible in comparison. Not only that it causes allergies in gluten intolerant folks because the cows are grain/soy/other stuff? fed. The milk I get from my local dairy is creamy, yellowish-orange, and fresh. It tingles on the tongue and is full of natural probiotics and soluble vitamins and minerals. Not "fortified."
Let's use common sense. Humans have been thriving for thousands of years on cow/goat/yak/horse/camel milk. When factory farming took over and we started processing ALL our food, we started having health issues.
If real milk caused issues I think the human race would have died out long ago from prostate cancer.