There is not treatment for all illnesses.
I'm not sure about your life's experience but it can't be too rounded in the case of being around
people who suffer from physical or mental illnesses.  Were you of an open mind, not only would you have the grace to acknowledge the rights of sufferers to get help with ending their lives, but this would apply to anyone, regardless of illness.  Mental illness often has its root cause in the physical and it much certainly is at the mercy of the brains iability to function properly.  And the brain is, as we know a part of our physicality.
So look into yourself and look at the lack of kindness and mercy that is required to kick the
habits of self interest and start listening to ill patients.  Respect their suffering and respect 
their asking for help to end a horrific life.  It's theirs to do what they want with.  As Sandra
Martin so rightly puts it to have a decent death should be everybody's right.  We are not killing of people, people choose this.