I am saying, what if the PC's circle comes to that decision, and decides to militarize society to save it from outside forces. Then, a different circle of celestial exalted comes to a different decision, and decides to destroy your militarized society for the sake of freeing the people whom they see as victims of an oppressive militaristic society.
Absolutely not.
I am saying that a boxer shouldn't be expected to solve cancer, just like a random gang or murder hobos shouldn't be expected to solve societal ills.
And I am saying that including "darker" aspects of the campaign should not be forbidden just because the PCs aren't tailor made to solve them.