They weren't surrenderers. They were throwing themselves and babies off of cliffs in midway rather than be killed or taken. We were throwing gasoline barrels down hides and lighting it because they wouldn't surrender or even come out of the holes in the pacific islands. The bombs sealed the deal. Besides, Tokyo was built of fucking wood- it's rare that a carpet bombing had that kind of effect, but burning rivers of napalm and burning civilian bodies in streets takes a mental toll on the population.
Just saying, but the damage from the air in ww2 can't be ignored, from both sides. Early on it was evident that the air battle was as much if not more important than sea and land.