[hagbard_c]

You don't need to live that far south for this to work. I live in Sweden at around 60°N and the ~14kW of PV panels on the barn roof provide enough power for that purpose through most of the year, the period November-February excluded. In that period it tends to be cold so keeping food for a longer time is not a problem. I live in the woods and heat and heat the house with a wood-burning stove and a wood-burning kitchen stove (which I use year-round for cooking) as the only heat sources so we're not dependent on electricity. We have our own water well and our own wastewater facilities (not dependent on electricity like 'modern' versions are) so we can keep our standard of living with or without outside power and facilities.

It is not pointless to publish recommendations because it makes people consider the possibility of regular facilities not being available. While city dwellers may not be able to keep more than a week's worth of supplies before they need resupply or evacuation that makes them more prepared for such eventualities than those who think they will always be able to use their mobile devices to order from the plethora of restaurants their city offers. It can make the difference between organised chaos and disordered mayhem if that war or crisis were to occur.

Be Prepared! is not just the boy scouts of old motto - no idea what the modern watered-down version of that institution professes - but also just a good idea. It does not mean you need to become a prepper but it does point out the need for some self-reliance because that whole fragile house of cards which is the service economy may just come tumbling down some day.