You need to read up on this. This is an unusual case.
This really is an issue of her husband wanting kill her off, after he spent her insurance money, and is living happily with his girlfriend and not allowing her parents to take her and care for her.
She did NOT leave a living will.
This is really a fight over guardianship and who wants the best for Terri, and with his entire behavior since her sudden illness, her husband demonstrated that he does not have Terri's best interest at heart. He has not been allowing her parents to visit her, was denying her parents access to Terri's medical records and so on.
He should NOT be allowed to just kill her off, which is what this amounts to.
When the courts require so many other decisions of importance (and nonimportance) to be in writing, how preposterous is it that such a decision to dehydrate and starve oneself to death NOT be required to be in writing?