Not an LDS member but I do read history. This group, on more than one occasion, found itself literally being "run out of town overnight". Frankly that led to the ultimate destination in Salt Lake City. And, too, they know they're a minority group. Given those two variables it would be sort of silly, in my opinion, for them NOT to encourage preparation.
I have friends who used to live in Taiwan and some from Hong Kong. Their reality was they never knew when (not if) the mainland might choose to invade. Their answer? Gold and diamonds. Very portable wealth. As one put it to me, and I don't mean to be indelicate here, but this is how he put it..."if you can't shove it up your butt, it's not a good investment in your future" (meaning of course having to bug out....)
Just my .02