How does it help?

You either keep in mind all the horrifying little possibilities the future could hold for us and try to prepare, accept and cope, or you push it out of your mind using whatever techniques available to you to not drive yourself into nervous spirals.

Ultimately it comes down to what your brain chemistry allows in combination with ways you practiced dealing with stress, existential dread, cognitive dissonance, etc.

I guess submission to a higher power is one way to deal with it? That way it's no longer your problem (alone).