Why do some ridicule such a fundamentally sound idea as keeping food and water stores to weather hard times?

I don’t think it’s reached the level of political controversy yet, outside of a few instances with Mormons, but the suggestion that one ought to have the wherewithal to not become a statistic in the aftermath of, say, a natural disaster (or unemployment) is not always met with high praise. Or even any praise, with the odd person substituting scorn.