Warning: This contains SPOILERS for Boruto #75News of how Amado Sanzu's daughter died in Boruto highlights one of the more perplexing characteristics of the Naruto-verse, namely the fact that in a world filled with an abundance of people with overpowered abilities, magic, and technology why overcoming the most straightforward and simplest threats to the community still remains a major weakness to the health and security of the Five Great Shinobi Countries.
As revealed in Boruto Chapter 75, the primary reason why Amado establishes links with both Jigen's Kara and Naruto's Konoha is his quest to resurrect his daughter Akebi. Akebi had died twelve years prior to the events in Chapter 75 of an unknown disease that doctors, in Amado's words, had given up on trying to cure. Initially, Amado was not sad at his daughter's death because he believed that through the power of cloning and mecha optimization he could replicate his daughter. Unfortunately, while he was able to replicate a physical reproduction, she lacked Akebi’s personality. Nevertheless, his cloning efforts eventually caught the attention of Jigen, who in reality is Isshiki Otsutsuki. Jigen promised to help Amado resurrect his daughter if he, in turn, helped create an army of super-powered Kara agents, and made the perfect vessel for Isshiki once Jigen's body became untenable.
Amado’s love for his daughter and the grief at her loss is what sent him down his personal road to evil, upsetting the peace that the Five Great Shinobi Countries were enjoying since the end of the Naruto saga., But the question remains, why was he ever put on that path anyway. That is, with all of Naruto's advanced ninja technology, God Tree cultivation, Tails Beast magic, and the individual chakra abilities of countless characters, it’s inconceivable that a cure for a disease could not be found. The Naruto-verse is loaded with examples of amazing ways people can be saved from harm
Naruto's World Should have Saved Amado's Daughter
Take, for instance, the field of medical ninjutsu, which is literally using advanced ninja techniques to heal and cure the injured and the ill. Top-level practitioners of medical ninjutsu such as Tsunade and Sakura Uchiha were known to use the chakra to administer cures at the cellular level. Since cells are the smallest living element of the human body, it would seem that Tsunade or Sakura could have cured whatever diseases Akebi was suffering from if they were asked. In Naruto Chapter 169, Tsunade demonstrated an advanced medical ninjutsu technique that allowed her to regenerate organs and limbs. In this case, Tsunade could have literally replaced Akebi's damaged organs to keep her alive, and regenerated new cells to replace any infected by the illness. In short, if treated by medical ninjutsu techniques, Akebi should have been cured, or at the very least, be able to continue living with treatment.
Medical ninjutsu is but one of the many options that should have been available to Amado without the need to turn to the Naruto world's Dark Side and elicit help from an Otsutsuki. The current predicament that Naruto's Konoha finds itself in could and should have been avoided. There surely was medical assistance Amado could have accessed to save his daughter. If he was not informed that such help existed, then the Five Countries are at fault for not providing easy access to such information. Conversely, If Amado simply chose to ignore the available information in Naruto's world then shame on him for being at the root of his own grief and the current problems in Boruto.
Boruto is now available from Viz Media.