If Shigure Tendo truly was the protagonist, then all that needed to be done was to leave him to his own devices.
However, this evidently wouldn't work.
A jinchuriki host seal… Even if this method seemed like the best out of the three so far, it was also a cruel one. Although this might require less of a sacrifice than expiation, it would still require a sacrifice. Also, this wouldn't solve the foundational problem.
Would Soul Society be able to deal with the Catastrophe Goddess if he gave the jinchuriki method to them? And even if Soul Society could deal with her, how many people would die before she was sealed?
What if he loaded again and gave Soul Society additional information? Would they be able to stop the Tendo Family this time? And if they successfully stopped the Tendo Family, would that prevent the appearance of the Catastrophe Goddess?
Various questions swirled around in Seiji's mind.