you're abit stupid i must say.I'm saying the ultime defense turned out to be a failure, kishi powered that sasunoo up so much only to have it taken out so briefly.
Are you implying that naruto could tank his own strongest attack? Cuz i dont think so.
Same rule works for sasuke, he has the defence but his own attacks should do damage to him, keeping shit balanced, 3rd raikge comes in mind here.