Some vegetarians claim we are not designed to eat meat yet we are not designed to eat dairy either?

Human babies and the young of animals are only ones that need their mothers milk. Humans dont need milk, it is not natural to keep drinking milk after we develop the ability to consume solid food, only babies need their mothers milk. In the western diet the average person consumes twice the amount of protein than our body needs, high protein diets are unhealthy and we can get healthier protein from a vegan diet.