Why do you make an assumption that is patently offensive and then claim you mean no offense? Why not be honest about your intent to offend people?
The only people that need ethics are the ones that do not have morals. Morally, you are 100% correct, which is why I agree that doctors should not kill people. Ethically, it would depend on who you are talking to.
The thing is, in order to assume a need to involve a doctor, I have to assume that the person in question is a complete idiot that does not have access to the internet. There are a multitude of sites that describe the various drugs, their side effects, and how to administer them. There is no need to involve a doctor in the decision at all.
I grew up reading Edgar Rice Burroughs, and the belief that where there is life, there is hope, resonates in me to my core. That does not mean I would never commit suicide, it does mean that the situation is unimaginable. Unlike most of the people here, I have volunteered in a hospice. I saw what people were like when they knew they were going to die. All of them were waiting to die, some of them had refused care that would have extended their lives, most of them suffered every day. None of them wanted to loose one moment of their life.
If I had a friend that wanted to die, and needed my help, I wouldn't ask a doctor, and I wouldn't need the permission of a bunch of dogooders in the government. I would argue with him, try to convince him to keep living, and do whatever I needed to do to help them with their decision.
That is death with dignity. Involving the government takes away dignity, and gives the government more power to kill.
Only fools want to make it easier for the government to kill.