No one in their right mind would volunteer to be dehydrated to death. As far as I know, suicide is still illegal. You can only refuse treatment if you're dying. She was not.
Now you answer, If she was TRULY PVS, how was she suffering?.
That isn't your decision to make; that is a decision that is the right of each person to make for themselves.
You can only refuse treatment if you're dying.
Oh, really? Cancer patients must be forced to undergo chemotherapy? Cardiac patients must be forced to undergo bypass surgery? That is positively Orwellian.
If she was TRULY PVS, how was she suffering?.
She wasn't suffering in any conscious sense, because she was no longer capable of cognition. Nevertheless, her wish to not be artificially kept alive this way should be respected.