The historical revisionist will tell you that Operation Olympic was a canard

[davidpdx]

another excuse for using the bomb. In truth, had the bomb failed, or had one or both of them gotten shot-down on the way to the targets there would have been not other way except a full scale invasion.

Okinawa had a 94% casualty rate for the Japanese. Taking into account how many people were in Japan that would have been much higher.