I don't like him, but that's beside the point. She said she wouldn't want to live like that. What's so hard to believe about that? I don't know anybody who'd want to live like that.
Honestly, I think a lot more people would have been more sympathetic to Michael if he had done this years ago before telling a jury he needed money to take care of Terri for the rest of HIS (Michael's) life. It seems a bit suspicious to get the money, then not long after stop even basic hygeine care for her and say, "Oh. I forgot. She once said she wants to die."