Board Thread:Theories and Speculation/@comment-30323490-20170305205254/@comment-6769189-20170307014636

Unless they create earth or water (like Tobirama) then it's an outside source considering the intensity those particular elemental releases are intensified by them.

Ninjas also can't cut things unless using wind release so swords afford them an ability they otherwise wouldn't beable to acheive otherwise.

Point I am trying to make is that Natural Energy should be considered a tool as well. It's not something that can just be given and recieved, it is free for everyone to learn to use.