Solar PV is great but is mostly grid-following so cannot operate on it's own. As I understand it you need a minimum fraction of power generation to be large spinning turbines.

I think this problem can be mitigated with add-on rotational mass style kinetic energy batteries or something like that. I don't think variable energy pricing will help if it's an issue with over-demand the grid managers can do rolling blackouts to manage while fixing the supply problems. The grid is just broken at the moment and the solar can't maintain the grid alone.

https://en.wikipedia.org/wiki/Inverter-based_resource

Believe it or not, but maintaining an electricity grid is a massive undertaking, and the people in charge of it knows the topic much better than you do.

The problem isn't a market problem, it's a physics problem: having a synchronized grid of AC current with many producers over a wide area is a real challenge, even when the underlying issue is resolved it takes a lot of time to add the power plants (or renewable equivalent) to the grid because they must be synchronized.

Let's skip the technical problems in your theory and focus on the social.

People need power to survive. You know, food, hot water, light, work, internet, mobile phones, entertainment, etc. This requires stability, not second by second pricing.

When you put a chicken in an oven, you want to cook that chicken and eat it, feed your family. Electricity price rising in the next few minutes would mean that you either have to risk disease (chicken staying in the dangerous temperatures until the electricity price drops) or being hungry and throwing food away. This is not how you want society to function.

I thank the heavens that the people who run the electricity system do not share your opinions.