If Huo Ying did not die for four generations, Naruto could not be the pillar of Kyubi no Youko.
According to the story of Naruto, our first hero, Naruto Uzumaki, needs a leading role aura, but he can't fall into the stereotype of fighting dad. Therefore, at this stage, Naruto can only sacrifice himself and seal half of Kyubi no Youko's strength on his son. It can be said that this setting of Kishimoto basically determines the subsequent direction of Naruto.
Therefore, the death of four generations of Naruto can only be said to be the need of the plot. In fact, at that time, the secret hiding place of Muye Village and Fuyue of Naypyidaw family were very powerful ninjas, and both of them did not take part in the battle against Kyubi no Youko for their own reasons, which also paved the way for the later plot.
In order to provide the protagonist Naruto with a relatively reasonable source of the protagonist's aura, Namikaze Minato's sacrifice is inevitable. Plus Kyubi no Youko attack without any warning, konoha can't arrange the village elite troops to deal with Kyubi no Youko in advance.
Because of the death of his parents, orochimaru began to study all kinds of technologies that can live forever, and conducted all kinds of cruel experiments in Muye Village. Later, it was discovered by Huo Ying's three generations that he wanted to go to Muye Village, so orochimaru could not be in the village when Kyubi no Youko attacked Muye Village.
Knowing that his parents' death was caused by Konoha, and that all kinds of forbearing wars experienced the deaths of relatives and friends, orochimaru gradually began to learn all kinds of forbidden arts to realize his wish of eternal life. At this stage, orochimaru has gradually begun to resent Konoha Village. Especially after his experiment was discovered by three generations of Huo Ying, he immediately led the Dark Department to encircle orochimaru. Finally, orochimaru had to escape from Muye Village, Kyubi no Youko attacked Muye Village for four generations, and Huo Ying was in a semi-retirement state for three generations. During this period, orochimaru was already a defected ninja in Muye Village. How can he help four generations of Huo Ying resist Kyubi no Youko? Even if you know that Kyubi no Youko attacked orochimaru in Muye Village, you will gloat. I hope that the three generations will die early and have the opportunity to sneak into Muye Village and learn some Ninjutsu scrolls.
Orochimaru's temperament changed greatly after learning the truth of his parents' death. The constant death of his friends in the war made orochimaru begin to study various methods of immortality. After being discovered by three generations of Huo Ying, orochimaru had to defect to Muye Village. Therefore, during orochimaru's attack on Konoha in Kyubi no Youko, it had little to do with Konoha Village, and it can be said that he died. Just don't help Kyubi no Youko attack Konoha Village.
Gang Shou was disheartened by the death of his younger brother and boyfriend in World War III, and left Mu Ye Village to drown his sorrows. I seldom return to the sadness of my konoha.
Gang Shou's experience in Huo Ying is still relatively tragic. His own brother put on a gift from Gang Shou and died on the battlefield of Endurance World War II the next day. Later, Gang Shou's lover Kato Dan was also seriously injured in the war. The death of relatives and lovers made Gang Shou lose the confidence and hope to continue living. He had to leave Muye Village to drown his sorrows by gambling, and he also suffered from phobia.
Therefore, when Kyubi no Youko attacked Muye Village, Gang Shou was traveling all over the world, and it was impossible to go back to the village to help. Even after learning the news that the village was attacked, Gang Shou could not immediately return to Muye Village, and at this time, Gang Shou, who was disheartened, did not want to get involved in Muye Village more.
Gang Shou's relatives and lovers died in the battle, which made Gang Shou suffer greatly. He had to stay away from Mu Ye Village to drown his sorrows. When Kyubi no Youko attacked Konoha, Gang Shou had already gone out to travel, so naturally there was not much possibility to help the four generations of Huo Ying.
After orochimaru's defection and Gang Shou's despair, Jiraiya began to think about the significance of the war of forbearance, and left Mu Ye Village to pursue his life ideal.
In fact, Jiraiya has always hoped that different individuals in the ninja world can seek common ground while reserving differences and achieve world peace. However, due to the distribution of interests, the struggle broke out inevitably. After his good friend orochimaru defected from Mu Ye village and Gang Shou left Mu Ye village because of the death of his younger brother and lover, Jiraiya Ye needed to find a new direction for his future life. Besides, Jiraiya didn't care about his power, so he didn't stay in Muye Village and expected to be a new member. Instead, he chose to write novels and travel around the world. Therefore, during Kyubi no Youko's attack on Muye Village, Jiraiya had traveled around the world and didn't know what happened in Muye Village.
Even if the situation came later, Jiraiya could not immediately return to the village to help. After his friends left one after another, Jiraiya decided to travel around the world to find a new direction for his life development.
Finally, to sum up, I personally think that the reason why Konoha three people didn't help four generations to deal with Kyubi no Youko can be said to be the need of the plot. Otherwise, Naruto wouldn't have the blessing of Kyubi no Youko's strength, and the three people were not in Konoha Village for their own reasons, so it is naturally impossible to help. Please forgive me if the analysis is not in place. If you have other ideas, please leave a message to discuss.