Some vitamins (A, D, E, K) are fat-soluble, so good luck not eating any fat and significantly increasing your risk of getting cancer. A lot of people have problems absorbing vitamin D from food on their own; helping them even more with low-fat food is wonderful /s. Also, milk from properly fed cows contains conjugated linoleic acid (CLA), aka Tonalin, which helps weight loss, despite being a kind of trans-fat, which we all know is dangerous /s.

I am always puzzled while in the States that I can't buy anything non-low fat and barely a single brand of unsweetened yogurt even in Whole Foods; it feels like I am forced to buy only inferior food over there, guys. I then imagine your food industry extracting most of beneficial fat from milk products and selling you supplements containing those ingredients for significantly higher price...