Active Euthanasia

From Time: A woman who has a terminal and excruciatingly painful disease wishes to commit physician-assisted suicide, and she is awaiting a court ruling on whether this should be permitted. I ask: Why should any government care if an individual wants to commit suicide? What is the benefit to society in prolonging an unwanted life? Why don't articles such as this ask such an obvious question as: "What business is it of the governments?" The questions asked are "Do individuals have the right to end their own life?" instead of "Does the government have the right to restrict what an individual freely chooses?". The distinction is in the form of whether rights belong to individuals or are they granted by the government. I thought one of the main points of the Enlightenment is to establish the fact that individuals do have rights, and government's job is to protect them. So, whose rights are being protected here?