There’s also no way that any amount of your preparations will materially improve your chances. If you stockpile, and civilization collapses, you will be raided for your stockpiles by stronger, better armed people. There will always be stronger, better armed people. If you prepare to live off land, how is that going to work when the land is dead?
There’s no escape for you or your family, except averting disaster in the first place, or death. Unless your prepping amounts to a suicide pact, then it’s just a fantasy to keep you from being too afraid. As comforting fantasies go, prepping seems like a particularly expensive and time-consuming one. Unless you’re desperate for the illusion of control, your time and money is better spent elsewhere.