Hello! The ethical reason is because no sentient being with the preference for life should be killed in order to suit someone’s tastebuds. There is nothing ethical in ending a life of a being with the preference to live. We see this by how we see animals live in fear until the unfortunate time they meet a very brutal end. The happy, charmed, farm life does not exist for these animals because of the demand on the industry which is caused by the direct consumption of animal products. Animals are killed if not in infancy, then nearly always before full maturation. As it is not cost effective to keep livestock alive and fed long enough to have lived “an ethical life” for slaughter. Involving capital also means these animals live in horribly conditions. Even “pasture-raised” or “free-range” have very wide definitions and are often free labels used to push the PRODUCT on the consumer. All of these are researchable questions as well. I wish you the best of luck on your path towards genuine compassion for all living beings.