I don't think it's the same concern. It's not that people will become pedophiles or act on it more because of the normalization and exposure. It's people will see less of a problem with the sexualization of children. The parallel being the amount of violence we are OK being depicted. The difference being we can only emulate in a personal level the sexual side.

Maybe there's the argument that violence is escapist, sexual desire is ever present and porn is addictive.