George McDonald Fraser (of Flashman fame) who had been a private solider through the Burma campaign* and was in preparation for what was expected to be opposed landings into Japan wrote of this argument. "Would you give up your life, and the life of any children you had after you were 24, in exchange for the life of one of the people killed at Hiroshima or Nagasaki? Because that is what you would have been asking us to do.) . There was a lot of cold war myth making about the atomic bombings just as there was around other horrendous destruction of entire cities, Dresden, Coventry, Hamburg for example. (My mum spent time on a YCL work camp rebuilding Dresden** in 1964 so it's not hypothetical to my family but its also not straightforward.)
* He got a commission after the war and spent time in North Africa which he wrote about in his excellent McAuslan books.
** Actually, she spent a week rebuilding then put a pickaxe through her foot so spent a month watching other people rebuild Dresden whilst taking pictures and drinking beer, her construction skills being not as good as her understanding of Marxist theory...