The Iruka card didn’t work, but it seriously wouldn’t be Naruto without his rebellious stubbornness. Iruka ups the ante by pulling the “you’re like a little bro” card (I guess it’d be a bit weird if he said father), but the exchange between them didn’t really bring up any emotion for me (except maybe a retort of cliches). It may seem like this time Naruto actually has a reason, and is wise enough to go out there against everyone’s wishes rather than his typical headstrong “I will beat everyone up on my own,” but it’s EXACTLY the same reasoning he’s always used.
Since the Pain arc, Naruto was apparently “matured” deeply as a character, taking on the responsibilities from Nagato to bring peace to the land. Though it’s pretty hard to keep count, there have been a number of times where Naruto has been “wiser,” but I’m doubting this is one of them. It’s true, he does need to get out and do something, but I’m quite sure he doesn’t actually know what it takes to create peace, so he banks on his usual motto of self-sacrifice. It’s fine I suppose, since coming up with some complex balance to ensure peace would seem more likely to come from Shikamaru, and watching Naruto achieve whatever he wants simply by stamina and straightforwardness is one of the selling points of his character.
While that’s part of the matter on Naruto’s decision, the other thing is that this current war itself is entirely different than the war in the past between villages Nagato was fighting against. This war is everyone united versus someone that everyone hates. Madara has zero followers, almost everyone he works with has their own agenda, so there isn’t really a “perpetuating cycle of revenge” if he is to be killed. Peace might come naturally after Madara is killed, due to the villages working together and bonding, so Naruto’s job is relatively easy in that aspect, but an ideal of eternal peace is almost impossible (I don’t think the manga will care that far anyway). My point is, it’s kind of a mismatch when the story tries to connect the two plot threads.
So while it’s just Naruto being Naruto with a hollow sense of character development, and criticizing the writing feels moot, I can’t say I’m not curious to see what the kid who’s still wearing an orange jumpsuit will do. His stubbornness and stamina was amazing to watch since beating Gaara, and now that he’s locked and loaded with an incredible array of “powers,” it’s simply time to lay back and watch him kick ass.