I mean, it's also a selfish expectation to be able to survive a couple of days without services. As a general rule, people prefer not to die.

My point is just that a cheap battery backup does not have a significant effect in the resiliency strategy for most people.

I am certainly not a prepper, but even viewing that scene from the outside, it is absolutely rife with what I would call "preparedness theater". Things you can buy (it's always about buying stuff) that would save you in some imagined horrific scenario but where the odds of the scenario happening in just the right arrangement where that object helped are infintesimal.

Like, yes, if your car drives into a freezing cold deep lake and you are somehow too incapacitated to open your seatbelt but not too incapacitated to use a knife, then keeping a dive knife in your glove box next to the ceramic "break windshield" thingy might be worth it, but you're more likely to win the lottery than have that happen.

There is a set of people whose brains are wired such that they are easily nerd sniped into obsessing about these sorts of things. When they do, they are also compelled to share it and spread it like some kind of mind virus. It takes a certain amount of mental discipline to not fall down every one of those rabbitholes. I believe the author telling the world to arrange joint battery buying parties for friends is well along that path of crazy.

Don't waste time and money organizing a joint battery purchase for your friends. Keep some non-perishables and a few gallons of water in your house. Fill your gas tank before it gets all the way to empty. Learn how to cook and some basic first aid.