Which concept?
The narrative invites the audience to a character development. We are supposed to follow the protagonist as he goes from a failure to the greatest hero. A quest narrative, as is common in Shonen (best example: One Piece), is the best approach to guide this story. However, this approach quickly fades away as the story inflates. In a complex way, themes, events and contexts are conceived as essential components, which in turn do not fit into a quest narrative. The actual development of the protagonist, which in the original assumption should be the main focus, is reduced to his increase in power and his attachment to existing and new relationships. The narrative is much more concerned with dissolving the connections and events of the story (what happened at the massacre? What happened to Obito and Rin? Who is Tobi? What is the goal of Akatsuki? What is Sasuke doing next?). It is more a way to the middle of a cobweb. Each path is connected to the other and runs parallel at the same time. The closer we get to the center, the closer and more complicated the connections become. In the end we experience how everything started hundreds of years ago and finds its narrative conclusion. Do we only have a historical narrative here? By experiencing the sequence of events from the past to the present situation. It seems, however, that one cannot make a decision here. On the one hand, the focus is on the protagonist himself, where his development seems to stand out, but which is lost in order to follow the evolving Story. There is certainly a narrow degree to harmonize both aspects well with each other - in this version however they hinder each other. Naruto is supposed to develop further, but is shifted to a stalemate where he is supposed to rescue Sasuke, since he is a relevant component for the rest of the story. There are pre-defined borders that Naruto cannot break through so that the cobweb can maintain the structure (he is stuck in that web like a fly). This leads to the characters following their path and not the other way around. The effects are unnatural actions, contradictions and completely illogical developments just to maintain the desired plot.
Yep, I know what you mean, River. Not to mention that there's also the facts some of the growth done in the story could tend to also be contradictory to some stuff we've heard and seen too previously. Exhibit A-- the fact Kakashi was UP to allow Shikamaru, Ino, and Choji have revenge against Hidan and Kakuzu, when it was no better for Shikamaru since he only wanted it not just for Asuma's death, but also because he thought his lack of "intelligence" is why Asuma died.
How can you say it's such a bad thing for one person when Sasuke was mostly as he was about revenge for Itachi due to the anger he felt over the massacre, but using it as an excuse for his jealousy for his brother, yet you can condone it for someone who just is having more of a pity party because he couldn't predict everything and only wanted it not just for his sensei, but his pride? Hello!! Am I the only one who thought "OK, this is ri-goddamn-diculous!!"???