This is my experience, too.

My mother has an illness that will eventually be fatal. She may have weeks left, or she may still have long, good years left--due to its erratic progression, nobody really knows. When she was going through a very bad patch, she obtained a fatal prescription from her doctor.

She recovered from her bad patch and is in a much better place now, and I'm glad as hell she didn't have to use it, but seeing that it gave her a measure of peace just to have the option made me reconsider my opinion on this whole issue.