You are speaking theoretically. That milk was necessary for survival by a small population of humans may have been true aeons ago during some ancient famine. T

You are speaking theoretically. That milk was necessary for survival by a small population of humans may have been true aeons ago during some ancient famine. This is not the case right now. To say that humans can take nutrition from a substance is an argument that there is no criticism of the substance is a bad argument. Humans take energy from pure sugar, or taco bell. Yet to claim they are beyond criticism because they can keep people alive is absurd.