I respect that you are expressing your opinion.
My point was - who are we to be so arrogant (no offense intended) as to decide the quality of life inside a failed body.
Hawking has the benefit of having become able to express the brilliance of his mind using computers and voice synthesis.
Would he want to live if he couldn't? Would THAT be inhuman torture to him - to be trapped with brilliant thoughts and no way to express them?
I don't know. He may. I wonder if anybody ever asked him or if he ever expressed an opinion on euthanasia. But, the point is that just as we have no physical knowledge of afterlife, we have no knowledge of another's mind or any measures it may take to survive within itself.