I guess it all depends on what scenario you’re preparing for. And I think it’s sort of a spectrum.
Personally, I don’t see the zombie/mad max on steroids scenario as being survivable, particularly for those of us in the cities, so why prep for it? It also seems like a depressing way to spend your life.
I think a more modest scenario of short to medium term unrest and privation is more realistic as well as survivable. I think the mormons do a pretty good job of preparing for this level of unpleasantries. And it doesn’t become an all-consuming task. So, why re-invent the wheel? They’ve already given it a great deal of thought.
I think a Mormon president would be a good influence on the country in this, even if no other, regard.