In a sense we all have a "right," or more precisely an obligation, to die. For the theologically inclined, see Hebrews 9:27. The debate is about the manner and method.
Should that decision be left in the hands of others whose motives may be suspect, or even to our own hands when our perspective may be clouded by drugs or pressures from family members trying to unload their "burden" and get to the estate before the money is spent?
Is this even ultimately our decision? We did not create life (not even in British laboratories where artificial sperm was recently whipped up in a Petri dish). The state is supposed to protect life, not take it except in cases of capital murder.
The One who gave us life has, or ought to have, sole discretion as to when it ends. But if increasing numbers of us think "The One" refers to a character in "The Matrix," and that we are just evolutionary accidents, then the conclusion of it all is euthanasia for the elderly, the "defective," the inconvenient and the unwanted. It's coming sooner than you think to a senior center near you, especially if Obamacare becomes law.
Debbie Purdy may think she has won a great victory for herself, but her "victory" is a significant loss for the human race.