Yes, that's why everyone needs a living will. The mind wants to die, but it is gone and the shell of the body lives on. Bad situation. Thankfully, for Terri, it's now over. Too bad it took 15 years of debasement before she was released from that awful body.
So you have personal experience with this as...? I worked with hundreds of these type of patients (and she was not PVS) for thirty years. Believe me the mind has lots of control over the body. If she was depressed and wanted to die it would have been over quick.
It's amazing how well one can adapt and even become happy in a situation such as Terri's especially if she had received some sensory stimuli. In my experience the survival instinct is very strong in most people, even under the most adverse circumstances.
But if she was PVS as so many believe then she didn't have any awareness and as such couldn't be suffering. So why kill her?
Oh I get it, it's for OUR convenience.