Ultimately I agree with you but semantically there are absolutely people who call themselves vegan that do not closely read labels for things like shellac. They just concern themselves for dairy, meat, etc either because it is a health concern or they don’t consider insects animals.

Similarly there are people who consider themselves vegetarian and eat tons of gelatin based candy despite the fact that gelatin cannot be made without killing an animal.

Doesn’t even get into refined/white sugar and the whole bone char thing!