If you’re asking whether anime, manga, oil paintings, and books glorifying the sexualization of children should also be banned, well, yes.
This is not comparable to glorifying violence, because real children are victimized in order to create some of these images, and the fact that it’s impossible to tell makes it even more imperative that all such imagery is banned, because the existence of fakes makes it even harder to identify real victims.
It’s like you know there’s an armed bomb on a street, but somebody else filled the street with fake bombs, because they get off on it or whatever. Maybe you’d say making fake bombs shouldn’t be illegal because they can’t harm anyone. But now suddenly they have made the job of law enforcement exponentially more difficult.