Re: A highly specious argument.
I can see what you're getting at, but I think you are mistaken.
Copyright is essentially about documenting who owns something. In the old US system. there was a requirement to register copyright, just as there are registers of land ownership. It's a sometimes imperfect extension of the ideas of property and real estate. You can, especially in the digital age, drag in some sometimes non-obvious economic theory. You can steal a printed book, because the person you steal from can no longer use it. If I were to "steal" a file from your computer, you would still have the original.
Privacy also depends on ownership rights. And sometimes gets complicated: when you rent a hotel room, do you have a right to privacy? In English law, there is a conflict between the right of a tenant to privacy, and the rights of the landlord to protect their property. There have been court cases. There are are words such as "reasonable" in the statutes. But at the heart of that balance is a clear identification of the parties to the contract.
I suspect we all are over-simplifying a bit, and the whole idea of an absolute property right can be challenged. If you want to blame William the Bastard for it, feel free. But, in the world we have, it isn't stupid to associate privacy with property rights, and some way of documenting ownership.
I don't want my privacy to depend on registering copyright with some government office. Which is why I dislike some of the assumptions that seem to be common amongst Americans. Some of them don't seem to have realised that US Copyright Law has changed to implement the Berne Convention. They have the same automatic copyright as us unfortunate Europeans.
But, wherever we are, it seems that money talks. Google can make money out of playing fast and loose with our privacy. And, too often, money shouts, screams, and throws the mother of all temper tantrums.
As far as privacy and copyright go, the various corporates and collectives are getting away with acting like spoiled children.
Think of the adults, please.