Last big outage here in Spain, we got a generator, wind turbine, solar and battery. All cheap Chinese stuff as it doesn't happen often, as a result, this event was barely noticeable to us. Especially the wind turbine did well the entire day and night until the power came back a few hours ago.
We are prepared, just have the people in the suburbs breed some more and ship them over to the decimated cities. You can think of people in the cities as the rat-wheel of production. No culture is better than any other culture, therefore all culture is expendable.
No, not realistically. There are physical and economic constraints. There's no reason to over-prepare either. It's absurd to remain as catastrophically vulnerable as we are though.