The World that we originally come from did have nuclear bombs. The World that we are in now, is only a simulation aka a projection of history as we see it happen. So from this point of view in this World nuclear bombs actually do not exist, but what we are seeing has happened for real but is now a projection. You might think this is nonsense, but in the book Alien Assessment of nuclear armed Earth you can find a method to check for yourself that you actually are a in simulation. You can do it within 10 min.

https://man-kindness.blogspot.com/2023/01/Alien-assessmant-nuclear-armed-Earth-disarm.html