There a lot of vegans who don't eat animal products and just leave it at that. Like my partner who just cooked me an anchovy pizza.
You never hear about the just-a-vegan-and-god-knows-why-you'd-want-to-tell-everyone, because they creep through the world, in absolute dread of being discovered by the like-to-tell-people-they-are-a-vegan people.