Let's try it this way
Do you think Terri would want to live this way if she was told that allowing her to die would bring her parents, brother and others untold anguish? Nobody ever asked her that question, did they?
What do you think she would say?
Assuming anyone ever really asked her any question at all. Where the hell were Terri's "wishes" when Michael was supposedly trying to keep her alive? At least until the lawsuit was settled for "medical expenses."