Well, of course they will air the most extreme stuff.
Not like it'd be an interesting show with your average-joe just putting canned food and supplies on a shelf in a root cellar or something.
I found the show a unrealistic. These folks have way to much money. Underground bunkers Castles etc. Fun to watch bur nothing to get excited about.
There must be something in the human psyche that desires a Maginot line. Bunkers, castles, compounds can all be breached given a determined attacker.
And enough time.