We'll have to change to beat climate change and it means dramatically refucing fossil fuel use by regulations, taxes, price controls etc. When supply is limited, the price is the mechanism that decides who gets the juice and who doesn't. In plain terms, the price will become as high as necessary to reduce demand to the level of supply. And this can make storage profitable too.

I think your examples are actually all flexible use cases. Car can be charged any time, if price is unpredictable you won't leave your battery empty on a work night. But also you don't necessarily need a car. Lighting is a silly example because it consumes negligible energy, but if you look at history it's actually very flexible. Dinner also takes negligible energy but it's also very flexible (see how people cook in places without cheap eletricity - biofuels).