The terrifying power of correction forcefully alters all of history; this is a fundamental change. Aside from the records in Yin World, all that can be seen elsewhere is the fixed history transformed into a time loop by Feng Yuan.
This wasn't Feng Yuan making a big deal out of nothing. The time loop itself has self-correction abilities, but ultimately, it's a patch placed upon the flow of normal time. Breaking it is much easier than altering history, and to avoid unexpected events, making it a fixed history is much more prudent.
However, even Agunas and the others find this difficult to achieve because this is not merely rewriting history; it's solidifying and locking this segment to prevent it from being modified again.
