The idea that you need to be given permission to end your own life sounds absurd to me. No one can be in the place of someone else and feel what they are feeling.
If someone wants to commit suicide, they will do it without asking for permission. The problem is when someone is so sick that he or she is unable to do it by themselves.
You can take it as pure discrimination. You know how everyone boasts about equal rights for people with disabilities? If someone cannot walk up the stairs because they sit on a wheelchair, a ramp will be set for them. How about if someone cannot walk up to the window in order to jump out? Where is the assistance there? I see double ethics here.
If someone wants to die, they should be able to. Apart from illnesses and pain, it also depends on how one views life and its meaning or purpose. Why is life so important anyways, one might claim. Why is non-existence so bad? Why are the atoms of my body better off working for an organism than converting into other forms of life and energy independent to each other?
Forcing people to stay alive just because "its the right thing and life is valuable" (for you) means that you oppressively impose your ethics and ideologies on them.