Killing animals to eat them is wrong. Your steak wanted to live. But animals also eat other animals. We are not wild creatures that act out of instinct but humans with moral knowledge, and therefore the capability to not choose unnecessary harm! We need to eat both plants and animals to live. Should I really suffer from malinutrition just for the sake of morality? We now have diet-supplementing pills, but if they were not available, then sadly yes!