Again, you have claimed one of the main characters. Also theme guess work is not the issue, its the way it's approached. The air of confidence around the disapproval of your theory is what I am questioning of him, not simple guesswork at what the theme is.
He seemed to hit hard/plow through my theory initially, antagonistic right off the bat, this could either be a dismantling of the true good/evil split between Naruto's friends and enemies or an earnest attempt to rid of unlikely scenarios.
You should have questioned me too but you seem to respond more to aggression rather than certainty in theory