The article mentions “The Commander Prepper”. I get it, yet I don’t get it! Especially, when bounced against “commanding and leading”. I guess if taken in the context of just prepping, I sort of get it. But if associated with after the catastrophe trigger has been pulled, I definitely have a problem with it. I do not know the leadership experience the author has had or even claims to know, but I do know from personal experience that situational and operational awareness, eminent actions and the make-up of your individual team dictate the three leadership styles. There is not enough time for discussion here, but you should research this on your own. Their is no replacement for hands-on experience, but leadership disciplines can be quickly studied, learned and put into practical use.
For global catastrophic risks the costs of food storage become impractical for most of the population  and for some such catastrophes conventional agriculture would not function due to the loss of a large fraction of sunlight (e.g. during nuclear winter or a supervolcano). In such situations, alternative food is necessary, which is converting natural gas and wood fiber to human edible food.
Earthquakes, tornadoes, and hurricanes can cause you to leave your home or even be trapped there. Roads could be blocked due to fallen trees, power lines, or even damaged earth from the natural disaster. Rescue crews can not be in all places at once. You may have to wait it out for quite a while before its over. You won't be able to go to the store or to the corner market.