Well that's an additional valid reason, but I still say the USA and Japan both would've suffered mrore casualities before an unconditional surrender by Japan would've happened. Also along the lines of what you said about Russia, the USA had to fill some role of protecting Japanese from revengeful Chinese after their surrendor. Point is dropping the A-bombs wasn't necesarily the bad thing that some people make it out to be and the reason for them to support their claims that the US is always the villian.
