Photo via The Big Picture... Commentary via me.
There's more than a little truth to this.
In hard times, the people that succeed are the people who not only can do for themselves, but who have the particular mindset of people who expect nothing else. People who enjoy the challenge of figuring things out. Who aren't afraid to get their hands dirty. These people, when faced with a challenge, don't automatically think:
"Who do I call?"
People who truly enjoy learning to do things "the old way" - whether they ever actually use those skills in a practical way or not, would be the ones I would want at my back during dark times. I like to think I'm one of those people. I make a conscious decision to learn as much as I can about a wide variety of skills that most people today consider obsolete. I may not be the "best" at any one particular skill - but I at least try to master each skill sufficiently enough to be serviceable at it.
Given an ax, and a stand of trees, I could build myself a fairly decent cabin. It might not be on par with the log homes you see in modern Log Home magazines... but it would be sturdy, warm/dry, and would beat sleeping in a tent or out in the open. I can milk a cow, shoe a horse, work a blacksmith forge, harvest honey from bee hives, make cheese, cook with a dutch oven, make rawhide, etc, etc, ad infinitum ....
Occasionally, having a short attention span works in my favor :)
The list of things that I still need to educate myself on is even longer, though. I've only just begun to brush the surface of the things I still need to learn. It seems that every time I pick up a new skill, I uncover two or three others that I need to look into.