That's an odd point of view. With Operation Downfall, the Americans were planning literal genocide against the Japanese. If they hadn't surrendered after the atomic bombs, the projections were as high as 5-10 MILLION Japanese casualties (with several hundred thousand on the Allied side), precisely because Japanese policy had been to arm the citizenry with rakes and hoes if it came to that - i.e., the Japanese refusal to surrender despite there being no possible path to victory was going to cost the lives of many millions of their citizens. And America had little choice but to pursue that.

That America was willing to do this, if the bombs didn't work, seems to contradict your claim. (And I think the Americans had little choice to do so.)