Really you are going to blame the problem on the well system, instead of the power company, that is some funny stuff right there but if they do have a problem with power going off, which they usually know this, a different system can be used and it dont have to be a CSV system.
A heated well house is great until the power goes off. This is something I hear from many people every winter. It doesn't matter who is to blame. They are still out of water and out the expense to get it fixed. If you don't plan for the worst case scenario, then that is exactly what will happen. Murphy's law will make sure of it.
And no you never HAVE to use a Cycle Stop Valve or a Cycle Sensor. But they can be the most important things to help make a well system able to handle any scenario you throw at it. Without a CSV, people with irrigation, especially when using just garden hoses, or any type of long term water use, have to plan water use carefully. You must use enough water to keep the pump from cycling itself to death, which you can't put enough pressure tanks on to do.
Sometimes after coming home from a long day on the pump or drilling rig, my wife would be in the yard with one garden hose running. Usually with some unusual sprinkler she found that sprayed water in patterns and "looked so pretty". There is no nice way to tell your wife she is doing something wrong. I would say, "dear, that pump needs to run 4 garden hoses at a time". I only said that because I had been fixing pumps all day that had cycled to death running one garden hose, when they needed to run 4 hoses to not cycle. But also because I didn't want to be fixing my own well again tonight before I could even take a shower. She, and therefore myself as well, have never been so happy since installing the first CSV, as I have never again had to tell her how she could or could not use the water around the house.
On top of that the CSV is the only thing I have installed on water systems that gets me so many compliments. Before CSV's is was always, "yeah the water is back on, thank you very much". After CSV's is has always been, "wow, the pressure has never been this good before".
I guess an example would be that a hunter never really needs a rifle either, especially if they don't know how to use one. But when they learn how to use them they can be a much better tool than a bow and arrow.