Obviously monarchy is an outdated concept, but this is a strange hill to die on. The King, or The Crown, is the merely the symbol of Canada’s sovereignty. That’s it. It’s no different than Americans pledging allegiance to the flag. They are not literally pledging allegiance to a piece of cloth anymore than we are literally pledging allegiance to Charles the man. It is just symbology. Neither Charles nor the GG has any real power in Canada and if they ever tried to use their symbolic powers independently of our elected government, it would create an instant Constitutional crisis.