Occams razor. The cultural habit of feeding milk to kids is more likely to be vestige of a culture trying to provide sufficient nutrition for its young, just as

Occams razor. The cultural habit of feeding milk to kids is more likely to be vestige of a culture trying to provide sufficient nutrition for its young, just as every culture thinks it’s healthy to provide its young with its staple. If it wasn’t a good idea, cultures that provided milk to its young would not thrive. Your argument seems dangerously analogous to anti vaccination conspiracy theories.