As someone whose grandfather was fighting in the Pacific, looking back sure seems easy to judge but there are no guarantees and in the horror that was WWII you don't really take risks 'because'. You ensure victory. My grandfather was forced to call in flamethrowers on other human beings that would not come out of tunnels. He never forgave himself for that. Was he a monster? Should he have told his supperiors to stall out their plans, maybe wait the guys out instead? He was part of the occupation and saw the damage the bombs did first hand, helped cleanup the damage, but he never doubted the need to end the war or the way it was done. But glad you looking back figured out a better way by volunteering to let my grandfather 'bottle them up'.

Didn't they have the goods for roughly four? Trinity, Hiroshima, Nagasaki, and the demon core.