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I find Diary to be completely unnecessary and was paid for by the diary industry.

Absolutely. The human body was not meant to process the milk of other animals.

What was it meant to process? Why have some of us evolved tolerance for lactose?

Fruits, roots and vegetables. A tolerance for lactose is not an indication of optimal human food.

I mean, some animals have evolved to thrive in post Chernobyl disaster Pripyat. No other animal consumes the milk of another species of animal.