That sounds simple in theory. In reality? You're just blowing smoke - because online storage in the capacities required simply doesn't exist.
Energy companies have a choice. They can sit in their arses and wait to die, or they can try to find solutions to these problems. If I were them I'd be calling up Elon Musk today and asking to discus ways of building grid scale batteries. 50MW batteries have been deployed in Japan for a few years now, so the technology is coming and they can either benefit from it themselves or miss out and find that individuals have installed them at home already.
Batteries are not the only solution. There are options. They are not easy, do-nothing options, but that's the way of the world. Evolve or die.