Sasuke attacked Kage and killed the Hokage. He is a Rogue ninja who can instantly be killed at any moment by any ninja. The same argument could have been made for Itachi or Obito if you're going to dismiss the things they did for them saving the world.
Itachi murdered hundreds of Uchiha = Helped save the world
Obito also murdered hundreds of Uchiha and shinobi; started a war = Helped save the world
Madara killed thousands of ninja, attacked the leaf village = Is about to save the world because he's going to help the hokage and the sage seal Kaguya.
You're an idiot.
