I can explain it for you - in fact I have done so - but I can't understand it for you. It's perfectly clear to me that you're not especially interested in any answers with which you're furnished and simply see this as an opportunity to go round and round and round with the same inane question which has already been answered by at least one person.
I know shaker of old - this is his way of saying he can't answer the question.
Shaker, don't pretend to be stupid - we all know you're far from it.
We know why she wants to die. But she can kill herself.
We know why she doesn't want to throw herself under a train. But she can kill herself.
We know why she wants to die peacefully in her bed. But she can kill herself.
She wants a doctor to kill her. But she can kill herself.
Why does she need a doctor to kill her when she can kill herself?
No, you have not answered that question.