Also, health and nutrition. Among health nuts many who consume meat advocate reducing intake whilst increasing legumes and veg. Even aping the popular aggregate "blue-zone" diets and the Mediterranean diet (the most researched of all) will lead to more restricted meat consumption than the standard western diet permits.
For those who like to heavily politicize diet, this is a perspective that gets buried by absolutists who like to identify as either pro/anti-meat. Silly.