Even if they are completely wrong ---- the Schindlers ---- what is the real harm in letting them just have their daughter back? Terri either has some consciousness or she has none --- in the latter case, she's not in any real pain or suffering if she continues living. Otherwise she does still feel something and should not be left to starve to death as her husband wants. Possibly --- but I have my doubts ---- Michael has some emotional thing going on about what he believes were here wishes ---- wishes she never apparently expressed strongly to anyone else --- not even to her own parents, nor felt so strongly about that she had those wishes put into writing. So her life would be at the mercy of Michael's "thoughts" or "memories". Even at the mercy of what Michael only thought she wanted --- but did not actually want.
In any case she doesn't seem to be in any great suffering by living, she is taking up just a small space on this earth, she requires minimal care, a little food and water --- she doesn't really require expensive nursing care --- IV's and meds or surgery or expensive machines -- so she's not much a burden on us taxpayers. She'll die in time --- whether that's 5 years, 10 years or 25 years ---- but how much time do any of us have?