There are no studies that show that a diet where one consumes animal products occasionally like 2-3 times per months is worse for health then pure plant diet. This is even when one does eat meat, one eats it a lot. Apparently body is able to recover from any negative effects of animal products within 10-14 days. And one avoids a potential for deficiencies like B12, iron, K2 that one may run on a pure plant diet unless one is careful. And even for environment it can be better if the animal products on those days come from slaughtered caws that are grass-feed on land where growing grains etc. is impractical.

So the problem is really not the meat, but it’s amount.