Ukraine now regrets giving up their nuclear weapons.
The "red line" of Ukraine attacking either Crimea or internationally recognized Russia was crossed and revealed to be a bluff.
The wall against proliferation will eventually break. For the life of me I can't figure out how Iran had a much harder time refining U235 with centrifuges than Pakistan did in the 1970s; I mean, I can understand how the US has been unable to deploy centrifuges to make enriched uranium for reactors (the same reason we can't have so many other nice things) but why Iran?
The lesson of Gaza may be that a people in a similar situation might want to have nuclear weapons at all costs. There definitely are paths left out of the conventional analysis of proliferation paths (accelerator-based methods, AVLIS) and even though they could reduce the footprint of producing the fuel they are also all super-high tech.)
And I agree, nuclear power is a ridiculous casualty of that scramble for power.
I'd also argue that the correct emotional response to the destruction rendered by a single airplane (vs. the 325 used for the Tokyo Firebombing) is abject horror, and that should cause any person to seriously question their use.
I'm not here to dispute that nuclear power is good or that the alternative to bombing Hiroshima and/or Nagasaki was worse than the bombings. It's that while Truman et al may have understood the extrema situation the Allies were in, that's no guarantee that future users of atomic weapons would be so deliberate.