Politically, Konoha might have to make some major changes. They might need to form new alliances or change their diplomatic strategies. Also, the morale of the villagers could be affected. Naruto has always been a symbol of hope, and without him, some villagers might lose faith, which could lead to internal unrest.
The village would have to rely more on other ninjas. Younger generations like Boruto and his friends would have to step up earlier. This could lead to a different kind of character development for them, as they are forced to take on more responsibilities without Naruto and Hinata's guidance.
It would be a huge blow to Konoha. Naruto is a hero in the village, and his departure would leave a big leadership void. The villagers would also lose a great source of inspiration. Hinata is from a respected clan, and her leaving would also have an impact on the clan's standing in the village. Morale among the ninjas might drop as they see two important figures leave.
Economically, there could be some impact as well. Naruto and Hinata are popular figures, and their presence in Konoha likely contributed to the local economy in some ways, such as through tourism (people coming to see the famous Naruto). Their departure might cause a dip in certain sectors that relied on their popularity, but it could also open up opportunities for new shinobi to rise and bring in new sources of income for the village.
From a security perspective, Konoha would be weaker. Naruto is a very powerful ninja, and Hinata is no slouch either. Their skills and abilities would be missed. Enemies might see this as an opportunity to attack Konoha. Also, Naruto has been a symbol of hope for the village. His departure could lead to a decrease in morale among the villagers. They might start to feel less secure and more pessimistic about the future.
The story could progress with Konoha facing a great threat without Naruto's help. The village might initially struggle to find a replacement for Naruto's power. This could lead to a sense of panic among the villagers and the leadership. Some might start to regret their past actions towards Naruto.
They could leave because of a prophecy. Some ancient prophecy might state that they need to leave Konoha to fulfill a greater destiny elsewhere. So they trust in this prophecy and leave their home.
It could also be due to a family issue. Maybe there is a conflict within the Uzumaki or Hyuga clans that makes them turn their backs on Konoha. For instance, if the village tries to interfere with the internal affairs of their clans in a negative way, they might decide not to offer their help anymore.
This kind of fanfiction could add a lot of depth to the Naruto universe. It could explore the darker side of Konoha that we may not have seen much in the original series. It could also show how far characters can be pushed until their loyalty breaks. And it might even lead to a redemption arc for Konoha if the story is written in such a way, where they have to change their ways to win back Naruto and Hinata's love for the village.
Konoha might be in shock at first. They have always relied on Naruto to some extent, and his refusal to help is completely unexpected.
The story would likely focus more on Naruto's individual journey. Instead of being centered around Konoha's affairs, he'd be out in the world facing new challenges. His relationships with his Konoha friends might become strained or take on a different dynamic as he's no longer part of the village.
Many relationships would be affected. For example, Sasuke's story would take a different turn. He might not have the same motivation to return to Konoha if Naruto is not there. Also, Naruto's other friends like Sakura would be devastated and might set out on a journey to find him. The power dynamics in the ninja world would shift as well, with other villages possibly seeing Konoha as weaker without Naruto.