After death, isn't consent (in terms of donation-to-the-state) the default? If I buy a house and then die without having written a will ("opting out"), the gov

After death, isn't consent (in terms of donation-to-the-state) the default? If I buy a house and then die without having written a will ("opting out"), the government can indeed take it. Yes, in that case they would normally try to give it to my heirs first, but my heirs have no right of ownership of my organs.