Coded Logic -
I would say that the underlying difference in how people are answering comes down to the fact that some people think "the most moral decision" is to follow what the person would want if they were conscious rather than doing what you would decide for yourself.
In my case, I am my mother's representative, her stand-in. So for me the most moral decision I could make is to honor her wishes. And I think legally, because she has that the blood card as a legal document, I don't think I could choose to do otherwise. Besides, she is a true believer regular pioneer, so you know hordes of people would swarm me should I do any different.
With all the information available, if people are staying in, it's because they want to. People believe strange things. Everyone has the free will to make their own choices, be right or wrong, succeed or fail. It's their right and it is not our right to strip them of it.