I guess the question Daisy is this; What are you gonna do about it....or, is there anything you CAN do about it????
Its tough when its your parents and/or siblings, but you gotta call their bluff, so to speak. Ask them what they're gonna do if this system lingers another 20 or 30 years, whats their Plan B if the big A doesn't come next week. If they're self employed they may not have social security to fall back on (for what its worth), so you have a right to be concerned.
Perhaps remind them about the 1975 fiasco and the problems it created for many of the R&F who sold out for Armageddon coming that year, then subsequently the years it took for many to recover (some probably never did). Of course the "new light" about the 1914 generation should also show them that no witness can get comfortable that "Sky Daddy" (sorry, couldn't resist) is gonna pull the plug any time soon.
If you want to have a serious conversation with your mother about this you probably should not '"attack" her beliefs, leave that for another time. But help her see that Armageddon cannot be a reliable retirement plan.
FWIW
Evi