I respond with:
Do you have any idea what's going to happen tomorrow?
They generally say "No".
I say "Neither do I" and walk away while they scratch their head, wondering wtf I just meant.
The problem is, the nation is used to believing life will go on as it has for them in their lifetime and they'll always have something to eat, place to sleep, etc.
There is a belief that the nation will always come through.
I other words there is no plan if a low tech monkey wrench gets thrown into the mix and all of a sudden, there's no food at the food place, no gas at the gas place, and the juice is out.
Lets see how the "just in time supply chain works" when most or all of the Interstate road system is shut down in a large segment of the country.
Pop a WMD at the I-40/25 interchange and another at I-10 and I-25 and see how fast you can shut down the entire SW US, since it will also take out rail interchanges, fuel pipelines, etc.