Back in the day AT&T spend lots of dough at Bell Labs to make the phone system highly reliable.
I've found solar/IC engine/battery bank/inverter emergency power to be expensive to buy/operate/tend.
Reliable Utility Power is an efficiency in daily life.
I’ve got some batteries charged with solar but they won’t last long even with just the fridge. A generator would be nice and a lot cheaper than the solar and batteries. But you are right the pros running the grid do it much better.