Eisenhower disagreed.
Dwight Eisenhower's view on using the Atomic Bomb
"In 1945 ... , Secretary of War Stimson visited my headquarters in Germany, [and] informed me that our government was preparing to drop an atomic bomb on Japan. I was one of those who felt that there were a number of cogent reasons to question the wisdom of such an act.... During his recitation of the relevant facts, I had been conscious of a feeling of depression and so I voiced to him my grave misgivings, first on the basis of my belief that Japan was already defeated and that dropping the bomb was completely unnecessary, and second because I thought that our country should avoid shocking world opinion by the use of a weapon whose employment was, I thought, no longer mandatory as a measure to save American lives. It was my belief that Japan was, at that very moment, seeking some way to surrender with a minimum loss of 'face.' The Secretary was deeply perturbed by my attitude, almost angrily refuting the reasons I gave for my quick conclusions."
Oh....And these other unimportant silly military guys...But ya...Crazy theory.
https://en.m.wikipedia.org/wiki/Debate_over_the_atomic_bombings_of_Hiroshima_and_Nagasaki under opposition
Other U.S. military officers who disagreed with the necessity of the bombings include General of the Army Douglas MacArthur,[83][84] Fleet Admiral William D. Leahy (the Chief of Staff to the President), Brigadier General Carter Clarke (the military intelligence officer who prepared intercepted Japanese cables for U.S. officials), Fleet Admiral Chester W. Nimitz (Commander in Chief of the Pacific Fleet), Fleet Admiral William Halsey, Jr. (Commander of the US Third Fleet), and even the man in charge of all strategic air operations against the Japanese home islands, then-Major General Curtis LeMay:
The Japanese had, in fact, already sued for peace. The atomic bomb played no decisive part, from a purely military point of view, in the defeat of Japan.
 Fleet Admiral Chester W. Nimitz, Commander in Chief of the U.S. Pacific Fleet, [75]