Ethical: cruelty is bad, so responsible production of meat is preferred but there’s no reason why killing animal for food should be bad, such that same argument can’t be applied to veggie production.

Environmental: grass fed meat is very much preferred to monoculturing the crap out of our planet. Animas are part of life cycle of the environment.

Health: crappy grains have done way more health damage than crappy meats. Also focusing on meat exclusively, skipping organs is unhealthy. Saturated fats aren’t as bad as you’re told (only in combination with sugars). Red meat doesn’t cause cancer (smoked foods do). Lots of myths around nutrition.

Taste: highly subjective.