This is the point that has been made over and over in this forum: she won't "go home" unless she is killed- starved. I would "go home" under those circumstances, too. The difference between Terri and your wife is that Terri is not dying. Sadly, your wife was. You made sure she was as comfortable as was humanly possible as she died. Terri is not dying. She will not die soon unless she is killed. The state of Florida is proposing to initiate a process that will end her life intentionally. This is not an "unplug the machine" choice.
Listening to Levin - just a moment ago, used the "remove the tube" lingo. That is the thing in this matter which is not getting full exposure.
We are all dying; the only difference is how soon. One cannot argue that having some so-called 'terminal' illness makes the difference. When one withdraws medical care, that shortens life. There is less life span than there would have been with the medical care.
but what everyone now faces (and almost every physician will advise) that one must weigh the quality of that life span against its duration. These are the toughest decisions which can be made, BUT they are made every day.
It is simplistic (and I submit wrong) to simply state that the increased length of life span must always trump the quality of that life span. Sometimes it does, sometimes it doesn't. Who shall make the decision? The person involved if they can and their designated representative when they can't. If they haven't designated someone, the law will.