Yeah but you wouldn't be happy that your incubator or AC didn't work when it needed to. You wouldn't be happy either if factories can't produce enough food because they would have to wait for wind or sun.
If your power gets cheaper because it's all renewables, then anyone could save up that money and use it for those situations.
But also, buying such a variable-price contract is only going to be an option. If you want a certain amount of guaranteed-price power, as an individual household, there will always be someone willing it to you.
You can spend some of the money you'd otherwise save on electricity in those cases.
> You wouldn't be happy either if factories can't produce enough food because they would have to wait for wind or sun.
A factory shifting hours wouldn't be noticeable at all by the time the product reaches the consumer weeks later.
If the factory isn't running enough hours at all, that's not a problem caused by renewables being unpredictable. That's just bad management.