Nuclear strike isn't particularly bad. Hiroshima + Nagasaki was 200k casualties or so. That many people are killed every year by sugar. Traffic kills over a million.

Any kind of worrying about theoretical future death is silly, especially accidental death like the kind you are asking us to devote resources to. Why should I care about theoretical future death when there is real, actual death happening all around me?

Heck, if you want to worry about future death, why not worry about climate change deaths, which we can actually model? At least that gives us some chance to do something about it.

Of course I'm assuming you actually care about public health. Maybe you are just worried about your own health, and nuclear strike is relevant to you because it has the potential to pierce through the barriers that distance you from people who are actually facing mortal peril.