Eating the flesh of an animal is not good for anyone.

It tastes nice and is a source of protein, iron and other minerals.

It’s not good for the animal who was abused their whole life and murdered.

True in some cases.

It’s not good for the environment.

True in most cases.

It’s not good for all the beings who get sick from pathogens because of it.

True. But pathogens also exist on plants. Which is why food standards exist that cover both.