How many people have their own oil pump in the back yard? And are self sufficient with food?
No man is an island.
In an extreme situation when you have no grid for a week then yes, having to slum it by only heating one room.
Every house having 50kwh would allow massive grid smoothing when wind and solar are fluctuating. Just one day of storage would allow a lot of arbitrage, but when power is cheap overnight and run solely off battery when it’s expensive.
I'd love to switch to a situation like that, tomorrow, please. But the reality is that unless such lack of comfort is shared people will simply not agree to it. It would be symbolic at best.