I read that, amongst other WP articles, while researching my comment. That one doesn't even attempt to explain the reasons for dropping the second bomb. (The quotation from the comedian is not meant to be an argument either.)
This section seems relevant:
...At first, some refused to believe the United States had built an atomic bomb. The Japanese Army and Navy had their own independent atomic-bomb programs and therefore the Japanese understood enough to know how very difficult building it would be.[74] Admiral Soemu Toyoda, the Chief of the Naval General Staff, argued that even if the United States had made one, they could not have many more.[75] American strategists, having anticipated a reaction like Toyoda's, planned to drop a second bomb shortly after the first, to convince t
Another month has passed and here is a new rationality quotes thread. The usual rules are: