For someone with an oxygen machine, yes it is. Many of those billions just don't have the option for this, they would end up committed to a hospital or dying because the treatment would never be seen as viable.

And now that I say it: hospitals need electricians too. Electricity goes out in a hospital for too long, lots of people die.

And actually a third point: electricity -going out- is not the only thing that could kill a client, it's not too hard to start a fire.

In North American winter temperatures?

you’re not wrong. But on the other hand, there are events like this. https://www.npr.org/2022/01/03/1069974416/texas-winter-storm...

So at least sometimes, it is life or death.