When the Queen dies, the commonwealth will cease to be. The British islands of the Caribbean have made it clear they want to be independent. Also Canada, and Australia have also stated that they too want to govern themselves. Time moves on, from when the Queen came to the throne. It is a different place now. Technology is huge. Computers, the internet, mobile phones, Not even touching on the universe. People in charge have to be able to manage all of this in their stride and interact accordingly. It wouldn’t do for the workers to be more adept than the Chief.