I notice that, believe it or not, sometimes veganism attracts the "facts and logic" kind of people who can come to somewhat of a principled, philosophical understanding as to why they should support veganism by thinking it out for a bit, but in that thought process, they forget that veganism is also fundamentally rooted in opposing oppression systemically. It's not a coincidence that radical animal liberation orgs tend to be explicitly leftist or even simply that leftism and veganism oftentimes go hand-in-hand.