Are you really asking why we can't power your fridge with plutonium?
Stop mocking questions. It solves nothing.
Per https://www.wired.com/story/nasas-mars-rover-will-be-powered... we currently have a lab dedicated to producing it, and it makes 3.5 pounds per year.
Per https://www.npr.org/2011/11/08/141931325/the-plutonium-probl... the cost of getting the lab restarted was a bit shy of $100 million. And once running fully it costs millions of dollars to run.
At those cost points it would be cheaper to deliver you a brand new fridge each month for the next 20 years than to deliver you a single fridge using plutonium to run without external electricity for the same 20 years. Not to mention that the plutonium itself is toxic.
Though FWIW I was more commenting on the mocking of a legitimate question. Not everyone has the same background as everyone else. There are no stupid questions.
I suppose if we're looking for a Randall Munroe / "What If?" style explanation of why powering consumer equipment with plutonium is a bad idea, then it was the right question to ask.