> Japanese had no navy to speak of at the time, America had complete air superiority, and had no qualms of firebombing Japanese cities and killing its civilians. They were essentially already defeated.

This roughly aligns with some of the island hopping campaign, but still the Japanese just wouldn't surrender. It was not on their culture to do so (at the time).

I'm not saying you're overall wrong, but saying I would not infer too much from your premise.