If you try to force people to stay alive, there will be mass group suicides of people in protest, (not saying that perfectly healthy people will all commit suicide, but people with cancer, depresion, those that feel that life is meaningless and can achieve meaning in their death).

You are taking death too seriously and only looking at it from your view point. She believes (most likely) that by dieing that way, without medicene helping her, that she is going to heaven, and that God will watch over her children.