True, but look at nuclear tests. There used to be around 50 tests every year, for decades. Now the only nuclear tests in the last 27 years were the six done by North Korea[1]. And there's still only nine countries with any nuclear weapons, and none in the past twenty years[2].

That's a bit better than just "it hasn't killed us yet". I think it shows we can at least stop the further development of this kind of technology.

[1] https://www.armscontrol.org/factsheets/nuclear-testing-tally

[2] https://en.wikipedia.org/wiki/List_of_states_with_nuclear_we...