Board Thread:Naruto Discussions/@comment-30168130-20170522201819/@comment-734582-20170524090608

QuakingStar wrote: Outside of Momoshiki, Yamato, Zetsu and Obito(He had half a zetsu body) only people with a Hashirama face on their body can use Wood Release. To add to this:

Momoshiki's source of power is unknown.

Yamato was an experiment designed to use Wood Release and have high levels of integration (unlike the Hashirama face people, who had the cells stuck on).

Zetsu use it either under coercion (e.g. in response to Naruto's chakra), and Spiral Zetsu is the only one who seems to be able to amplify existing wood releases.

Obito used Wood Release when encased in Spiral Zetsu

So to expand on your post, Naruto and Sasuke lack the face, have it only as a prosthesis (In Sasuke's case i assume the cells were used to close the sword hole, like how Madara used it), and are not being encased in a Spiral Zetsu.

I would also like to point out that Zetsu's wood release went out of hand when faced with Kurama's chakra, so i find it highly likely that Naruto simply can't control wood release, as his chakra prevents any form of proper control.