Shame on any dealers for using this scare tactic.
I live in an area where it's possible to get to -30 F in the winters, not including the winds impact.
In the past 4 decades, I can remember only one time that power went out in the winter- that was last year, and it only lasted a couple of hours. Water temperature only went down a degree or two.
For those who live in areas more prone to power outages, get a small generator, and rig up a light bulb for heating the cabinet space. There really isn't much else you can do.
If our power ever goes out at below zero temperatures for any significant lentgh of time, I've got way more important things to worry about- my house.