Perhaps there are external threats that the village is facing. The leaders might think that Naruto is more valuable in his current position, where he can be used as a front - line fighter. They may believe that promoting him would mean taking him away from the direct combat and strategic roles that he currently excels at, and they can't afford to do that during a time of potential danger.
Naruto could be confused. He may not understand why he was denied when he has accomplished so much. He might start to question the system and those in power. This could lead him to have some internal conflict as he tries to figure out whether he should continue to strive for the promotion within the existing framework or find his own path.
In the 'naruto denied training fanfiction', perhaps Naruto denies the training because he doesn't trust the person offering it. Naruto has had his fair share of enemies and untrustworthy characters. If the trainer is someone he doesn't know well or has a bad feeling about, he would surely turn down the training. Also, he might be confident in his own self - taught skills and the training he has received from his masters like Jiraiya.
One possible reason could be that some elders in the village still have doubts about his past. For example, his connection with the Nine - Tails. They might fear that this could lead to instability in the village. Another reason could be political intrigue. There might be other powerful clans or individuals who want the position for themselves and manipulate things behind the scenes to deny Naruto.
One possible reason could be that Kakashi might think Naruto is not ready yet. Maybe Naruto hasn't mastered some basic skills that are prerequisites for the more advanced training Kakashi has in mind. Another reason could be that Kakashi is worried about Naruto's recklessness. Naruto has a tendency to rush into things without thinking, and Kakashi might fear that this could lead to Naruto getting seriously injured during the training.
Another idea is that it's a satirical look at the concept of expectations and denial in the Naruto universe. The fanfiction might use the 'orgasm denied' concept as a metaphor for all the times Naruto has been denied something he really wanted, like becoming Hokage right away or having his friends understand him completely at first. So it could be a way to explore his character's journey through these repeated denials in a unique and somewhat humorous way.
He might feel angry and frustrated. Naruto has always been proud of his potential and his roots in some way. Being denied his heritage would be like taking away a part of his identity, so he'd likely be quite mad at those who are doing the denying.
It could be due to the current situation in the village. There might be threats that required Naruto to stay. Tsunade, as the Hokage, had to consider the overall safety and stability of the village. So, she denied Naruto's request for the training trip to ensure he was available in case of any emergency.
One consequence could be a loss of self - confidence. His heritage has been a part of what has motivated him to become stronger. Without that connection, he may start to doubt his abilities.
Another aspect could be that it's a story about Tsunade denying Naruto's request for a particular mission or task. Naruto is all eager and raring to go, but Tsunade, as the Hokage, has to think about the bigger picture. So she denies him, and the story could be about how Naruto deals with this denial, how he tries to prove himself worthy to her, and what kind of growth he experiences in the process.
The theme of authority might also be present. Tsunade is in a position of authority and her denial of Naruto shows the power dynamics between them. This could be explored further, like how Naruto respects or challenges this authority. Also, the theme of friendship or mentorship could be there. Tsunade may be denying Naruto something for his own good in the context of a mentorship - like relationship, and the story could be about how Naruto comes to understand her intentions over time.