Three things:
-This is moving the goal post of the argument that I was replying to and irrelevant to this conversation.
-Theorizing about the consequences at stake in the war doesn't assume anything retrospectively. The decision to deploy nukes was not made with the knowledge we possess after the fact.
-It's very likely that any other option that would finally result in the complete cessation of an enemy as ideologically tenacious as Imperial Japan would've far exceeded a price that was able to be paid that late into the second world war.
From what I understand this is not the main point of contention among historians. That Imperialist Japan, like all Axis powers, was a cancer that demanded amputation was not the justification for the deployment of nukes. Rather, the debatable justification was their leadership's inability to surrender unconditionally.