There have been 32 officially acknowledged US nuclear weapon accidents, known as "Broken Arrows," between 1950 and 1980, involving events such as accidental launching, firing, theft, or loss. Of these, six nuclear weapons have been lost and never recovered. These incidents involved plane crashes, fire, or accidental drops.

The fact that Human incompetence hasn't wiped us out yet is a big reason why I believe in God.

Personally I feel the long term outlook is not good. We've already had a number of near misses, even though the number of countries with nuclear arsenals is likely as low as it will ever be, and no nuclear armed state has yet gone through a serious civil or genuinely existential state of war to my knowledge. At least the number of warheads is way down since the Cold war. There's no real end in sight though. We just have to keep getting lucky until we're probably an interstellar civilization to be reasonably free of a nuclear self-extinction risk.

The anthropic principle is all you need. We find ourselves on a timeline where we survived because we can’t find ourselves on one we didn’t.

In Christian Slater we trust. For those non boomers who don't get the reference: https://en.wikipedia.org/wiki/Broken_Arrow_(1996_film)