It's also unethical because it destroys the planet, harming everyone and everything on it. That is baked in. Producing meat will always take several times more resources than an equivalent amount of plants. Since our society refuses to limit usage of water, ground nutrients, etc, to sustainable levels, eating meat will harm the environment. Every bite of meat you take steals from future generations.

Killing animals that don't need to be killed is also wrong. And in a modern society, there is no requirement for us to eat meat, as we can live full lives on wholly plant-based diets.