My guy. You do understand that it's not a rule of nature that only cheese from those regions can be called Parmigiano Reggiano? It's a rule that is made by us, and we could change this rule?
I literally have no idea what you're trying to tell me. Why do you think it's impossible to change these rules? Why can't you imagine a world without them?
Just as an example: you can make a Frankfurter sausage outside of Frankfurt, or a Wiener sausage outside of Vienna. Doing so doesn't make the sausage explode and kill everyone around them, or make the gods raze the city for their insolence. It just... works. Why can't you imagine the same working for cheese? Where is the rule of nature that disallows this to happen?