You can absolutely prioritize your risks, which means you’re not precluded from taking sensible precautions if you’re able to. This isn’t rock/paper/scissors. If you’re far enough away from the point of impact and the winds are right, Covid might be more of a threat than a nuclear bomb.
If you’re two states away from where a bomb goes off, and insist on open-mouth kissing strangers as they cough on you, that’s up to you. But also you can just throw on a mask and step a few feet back from folks and be a little safer.
Also, really bad scenarios can often stem from a couple of things going wrong all at once. So just be safe and use as much good judgment as the situation allows. And lean on easy, automatic, strategies to help you not compound issues.