Why do people eat Non-Veg food??????

Well when we are first born we eat milk not grass no tofu, so that is in a way telling me that we are ment to drink milk. As we cant drink human milk we use the next best thing. Eating meat also has advaniges in our health. I dont think we are killing animals for no reason we kill them to eat them thats a reason enough. Its not just eating them that kills animals we do it every day and there is not a single person on this planet who is not responsible for the life of an animal. Clothes that we wear, trees for all things in life (burning, paper, furniture), polution.