Board Thread:Theories and Speculation/@comment-30323490-20170305205254/@comment-734582-20170308105239

BakumatsuWarrior wrote: If I understand it correctly, the OP is asking about those shinobi who became strong through Talent+Training, instead of cheats originally did not belong to them: like a bijuu, borrowed dojutsu, or Hagoromo freebies In order to obtain his "freebie" Naruto needed to show the world repeatedly that he believed in a better world and had to walk a much harder path than he needed to. In order to obtain Sage Mode, Naruto needed to have his teacher killed and his village threatened for the Frogs to even start teaching this. In order to obtain his Jinchuriki power he had to defeat and convince Kurama of his beliefs.

There is no middle ground: Either everything is OK because it took effort to obtain it, or every power not directly obtained from one's own body is an outside power. Even Kaguya had to survive a war and get to the fruit (Which was forbidden) to obtain her power.

In the Naruto series it's clear that the former rule is accepted (see: Chunin exams: everything is a tool, all is allowed). But that would make this thread obsolete.