Yeah, but we talked about morality. Was it ok that the Japanese experienced the power of nuclear bombs in Hiroshima or should the Japanese government should have seen it before? I mean, they could have been invited to New Mexico. Or Little Boy could have been dropped over a small island to cause fear!
The fact is that the Japanese leadership expected the Japanese nation to cease to exist as part of their warrior code.
The US had been bombing their cities, destroyed their Air Force and Navy, and thus, the Japanese had no hope of winning the war.
The fanatical nature of their resistance was seen in Okinowa where they encourged the civilians to commit sucide and attacked our ships with the Kamakazi's.
Even the Atomic weapons did not change the mind of the military, it took the intervention of the Emperor himself to finally end the war to save Japan.