There's a lot of inconvenient facts for the bug out crowd.
I suspect that the bug out crowd has never been in the traffic jams that occur in running from a hurricane.

A nuking would up the ante to a degree nobody would want to think about.

If someone can get going an elegant protein source... cuy. Spare room, some boxes outside (depending upon climate).

Can dig up that ridiculous lawn (in survival terms) and plant things they may not now know anything about... but if they went and took a look at how others survive... that could feed a family...

That leaves water.
If you go out to a semi-rural area with a well with an aux. hand pump, you are far ahead of most.

The extravagant thinking, chest thumping un-realists are to be:

1. Pitied

and some, for their mean-ness,

2. despised