It’s still not earning you money to spend electricity because you still have to pay the transfer fee which is around 6 cents / kWh but it’s pretty damn cheap nevertheless, mostly because of the excess in wind energy.
Last winter because of a mistake it dropped down to negative 50 cents / kWh for few hours, averaging negative 20 cents for the entire day. People were literally earning money by spending electricity. Some were running electric heaters outside in the middle of the winter.
It’s entirely possible for a natural nuclear reactor to occur. So yes, you can separate humans from the process. Make a reactor that a human can’t reasonably open and has zero chance of melting down, and you have safe nuclear.
Also yes, you can make a reactor that can’t melt down (without human interference). It’s called an RTG and they’re commonly used on spacecraft.
If you could entirely separate humans from the process, then there would be nobody to design and build it.
Then a war starts between a nuclear nation… Oh wait.