I’m not sure why you are making up imaginary arguments. Have you ever heard anyone ever accuse someone else of “not being vegan anymore” because they ate a non vegan product? I know quite a few vegans, I try to be vegan myself (but quite often cave, cheese is delicious), and all the vegans I know would be simply thrilled to know that someone was making an effort at all. Literally no one cares if you aren’t 100% vegan, basically no one is anyway. But if you decide once a week to eat a vegan meal instead of a steak, great!! That’s still helping the planet, better for the animals, etc.
But making up these ridiculous vegan cliches doesn’t help anyone, it just makes more people annoyed at each other.