"You gotta remember milk is made to be utilized and absorbed by the body,"

Cow's milk is made to be utilized by young calves, not adult humans. Many people have at least some degree of lactose intollerance, which tends to get worse with age.

As for cow's milk being a complete food, here is some research. It only measures 45 out 100 on their completeness scale.

http://www.nutritiondata.com/facts/dairy-and-egg-products/69/2