I actually got the opposite interpretation from some people.
It's because Naruto trusts Sakura, he is leaving her to take care of the Shinju tree. There are three major obstacles/villains: Madara, Obito, Shinju. Hashirama is taking the lead against Madara. Naruto/Sasuke are the lead against Obito. And Sakura/Tsunade against the Shinju.
The other kages, the alliance fodders and the rookie 9 all go somewhere under the three major leads 1. Hashirama against Madara 2. Naruto/Sasuke against Obito 3. Sakura/Tsunade against Shinju. It's obvious that Sakura/Tsunade/Hashirama is not to be on the same standings as the rookie 9, they are the main factors to beat down the villain/obstacle. Naruto/Sasuke/Sakura/Tsunade/Hashirama has so much more responsibilities to protect the alliance. Obviously, Sakura not being one of Naruto's pawns has nothing to do with some petty trust problems. No, Naruto and Sakura's situations are in a much more larger scale than that. Her Byakugo no Jutsu is too important for the battle to be discarded only for her to hold a rasengan and fly in Naruto's tail and shout "FRIENDSHIP!!"
Naruto leaving the Shinju in Sakura's(and Tsunade) care is proof enough that he is confident with her abilities.
Which doesnt make sense, why he didnt let the rookies take care of the shinju tree aswell which he could break the barrier with his kagebushins.
In fact Sakura didnt go because she's busy with Katsuyu, she's obviously busy with her actual job.
@Chatte About Sakura i'll just post some manga facts.
1- Hinata, Naruto says that she's strong and all, on 613-614 when she shows up along with Neji and her father, he shows quite worried that she's on the frontline fighting alongside Neji and her father, which leads to the obvious conclusion that he said that just to make her feel good rather than an acknowledgement.
He thought she's weak and cant fend for herself.
"http://i31.mangaread...uto-3761899.jpg"
2 - About Sakura, After she heals him, Naruto gets up but later calls Sasuke to fight, Sakura jumps in and says "you think i'm a weak woman that cant compete with you", Naruto returns with a smile leaving the hint that he acknowledged her.
"http://i3.mangareade...uto-4168507.jpg" "You should rest now"
"http://i4.mangareade...uto-4168509.jpg"
But seconds later we got this "http://i29.mangaread...uto-4193175.jpg"
The sfx means terror, i dont know what does this mean but if he was worried about her or it's his first reaction to Sakura's about to punch a zetsu.
3 - Shikamaru's condition, Sakura could have done it by herself but he interferes and get in the middle, i dont think Naruto strongly acknowledged all his friends, because on desperate moments when obvious the truth is revealed he feels the need to get on the middle he doesnt let his friends do it by themselves.
And i agree with you he's being overprotective but this means almost the same thing.
Edited by Dαrkrєrsŧ, 18 October 2013 - 02:34 PM.