From the main storyline of the Ninja World Reform, Chapter 232: Like Bathing in Spring Breeze. Even today, the "future" Yuhara knew theoretically would no longer unfold one hundred percent as he remembered it. Or rather, his "precognition" could only predict the general outline. He could only know the direction in which the Ninja World's overall situation would develop, not determine exactly when any particular event would happen.
This could not simply be attributed to the butterfly effect. If the timeline had been reset at some point in the past, then without deliberately adding variables, no one could be certain that this timeline would "return" to that point in exactly the same way.
People's thoughts were fickle, and even more uncontrollable. Some people, in particular, were always "full of schemes," and possessed the status and influence to turn their thoughts into reality... Shimura Danzō, for example.
Naturally, Yuhara had no way of guessing Shimura Danzō's thoughts and actions. The two of them were one in the light and one in the shadows, and theoretically had little contact. If Yuhara could even calculate what Shimura Danzō was plotting, then he would truly deserve to be called omniscient and omnipotent.
Fortunately, with his current strength, he did not actually need to strangle every conspiracy in its cradle. That would be asking too much of him. He could simply wait until a conspiracy erupted before dealing with it. In any case, Danzo's strength and abilities were only so-so. Even if he tried to overturn the Ninja World, he would not be able to do it.
As for more direct and decisive methods, such as uprooting the source of the problem, the same principle still applied: Yuhara had to follow the rules. He was not a terrorist.
He sought neither political status nor command