You are a carnist. That's a political standpoint and philosophical and moral practice as well. You might not consider youself a carnist, you think you're just normal because eating like a handfull of animals and drinking one animals mothers milk was normalised to you from birth. I was raised a carnist too. Yet it's a decision, not a necessity. We don't need meat and milk to survive, we choose to kill animals because we are accustumed to the taste. So we keep the system running.

Yeah! Someone could be vegetarian for lots of sensible reasons, like religion or fad diets. But veganism is based on the idea that slavery is wrong, which makes it bad.