Naruto doesn't need KM. He needs to rely on power he actually worked for on his OWN, like Sage Mode.
But he did work on getting used to Kurama for the past 16 years. That's what Sasuke fanboys don't get. Kurama is the reason Naruto sucked at chakra control, he is the reason he spent a big part of his training to adapt to Kurama's existence. If Kurama wasn't sealed in him from the beginning, he wouldn't have been dead last in his class that whole time and couldn've learned much more jutsus.
Just like how Kakashi had to get used to having his Sharingan which consumes a big part of his chakra and on which he developed his techniques and fighting style. What would happen if his sharingan suddenly was taken away? He would've wasted all of his training since he got it. Same thing for Sasuke, Itachi, etc...
They based their fighting style and techniques on the powers they possessed, trained and struggled to master them.
It's funny how people say that Bijuu aren't a jinchuuriki's power yet the sharingan (and I suspect most/all of KG) came from the Juubi.