Taking responsibility is the main thing. For what we use and the potential waste we create. But a lot of waste is actually resources. Even poo. Humans are the only creature on the planet that creates wast. Or if someone eats a standard diet, waist.
The other reason is we have bush fires in summer and storms in winter that shut down the local power grid.
The real challenge of off grid life is getting protein. Fishing and hunting are options. Hunting is not really a social culture in which I circulate. Growing protein is the trophic level up to achieve.