His "Toon Force" is comparable to the writer. I don't mean the DC one, I mean the canonical character creating the entire narrative of Loony Tunes. This guy can warp reality on a scale of which the only character I can think of that's comparable to him is most people from the Cthulhu Mythos and Marvel Comics characters.
People don't understand that if a character cannot manipulate reality or is basically a god(not a 'god of destruction' sort of god, im talking about 'the' god like OAA or The Presence), they cannot harm Giorno.