I get it. I'm default vegan but bought some brie to enjoy tonight as a treat, wear leather shoes etc.
People want to be black and white. Sometimes just reducing the harm on yourself and animals and the environment to a large degree is enough, while still being able to enjoy and benefit from them just a bit here and there
You are not vegan.
We can't confuse the idea of seeing the world as less black and white, and outright changing definitions.
You wouldn't say "Oh I'm default teetotaler, but I bought a bottle of gin as a treat for tonight"
If you want to identify as vegan, that's probably because you see the label as having some value. But for it to have value, it must mean something!
A lot of people doing mostly the right thing is a lot better than the same people thinking it's pointless to try.