My point is that running those things is not free or cheap, and that with floating energy prices, you now have to make them significantly beefier and make economic decisions about when to run them. You will also have many more of these generators show up. People adapt their behavior to the incentives you give them, and the design of generators is also very much more subtle than you are giving credit for.

So yes, while it seems like people already have infrastructure for floating energy rates, in reality they do not.