The problem with this article's defense of firearms for disaster preparedness is that firearms are among the least urgent disaster-preparedness items. If what people were really concerned about was disaster preparedness, the things they would obsess over would be flashlights, water storage and purification, a few weeks of food supplies, backup power sources, medical supplies, portable radios. Some preppers do spend time and energy thinking about this, it's true.
But usually what you typically have is a person who enjoys guns and is trying to think about a situation where it might possibly be useful to own an AR-15. It's a terrible self-defense weapon in an urbanized area (compared to a shotgun or handgun), and they're illegal to hunt with in lots of areas. Owning such a gun requires a major investment of money and time (for practice and training), and encourages this kind of paranoid outlook. So you have interest in guns driving interest in disaster preparedness, rather than interest in disaster preparedness driving interest in guns.
But usually what you typically have is a person who enjoys guns and is trying to think about a situation where it might possibly be useful to own an AR-15. It's a terrible self-defense weapon in an urbanized area (compared to a shotgun or handgun), and they're illegal to hunt with in lots of areas. Owning such a gun requires a major investment of money and time (for practice and training), and encourages this kind of paranoid outlook. So you have interest in guns driving interest in disaster preparedness, rather than interest in disaster preparedness driving interest in guns.