it is even more dire - transport of gas - imagine hurricane, tornado damages, pipelines, electric supply for gas pump pumps... good luck with pumping gas without electricity, or i remember 8 hour queue before hurricane in front of gas station for some reason...

with PV on roof you do not need to transport anything from anywhere, charge and be functional. not even talking about house comfort while literally everyone around you is panicking, because of lack of electricity. ( you can connect 200watt inverter to your outlet to help "pace" ongrid inverter to work in offrgid situation, so yes all PV can do offgrid for 30 bucks on top)

yes generators are a thing until russia knocks on US sovereignty and US does nothing about it - Colonial Pipeline ransomware attack ...