Even more so when you think no one else had a good reason to use nukes againist an enemy. Even today the estimates for bringing an end to world war two wa hundreds of thousands of lives, and another 1-2 years of fighting. Unlike Germany fire bombing Japanese cities wasn't having the desired effect.
No wars since then have been that desperate for those with nukes. Which is the only reason why north Korea is troubling. North Korea or Iran will feel desperate enough to use them.