My Dad spent most of the war in the CBI Theater of War. Everything was being shifted closer to Japan when the war ended.
He was in the initial Occupation of Japan and what the occupation forces saw scared them. It would have been horrible had we invaded.
Thank God for the bombs.
From my limited, sinful, fleshly perspective, it's a good thing we were able to end the war when we did.
But I'm not sure He works like that, and I'm not sure the uses of critical masses of U235 and Pu239 were His idea.