I understand why you think Naruto doesn't need to become hokage anymore, but once again back to Itachi's quote. You're implying that being the Hokage would earn you respect in the first place, which it doesn't.
Naruto hasn't got everything that he wanted, you're forgetting about his own desires. He might've only wanted respect in Pre-Shippuden, but after facing Pein and so on, he decided he wants peace in the ninja world, and being hokage he could change the systems that messed everyone over and finally end the cycle. That's the bigger point of this whole plot.