I think your question actually speaks as well to the idea of patients having access to necessary treatment options even prior to making or requesting this decision. We know that is a huge problem with mental illness. The Canadian Mental Health Commission tells us that only about one in three Canadians who have mental illness or mental health-related problems get help for them, and for children and adolescents it's closer to one in four. I know that patients committing suicide is a different discussion, but even there we know that a only significant minority of them have seen a mental health professional in the past month. It's only about one in five.
In terms of what you're asking, this involvement should not be seen as the end point. We actually need to get involved much earlier to help people with these mental illness-related issues, and that may remediate suffering far before they get to the point of a request.