Obviously. But in the case of assisted suicides, the death is more dignified and merciful.
Let me tell you, I know I would feel so much better if I knew my grandfather was murdered by a doctor (screw the Hippocratic Oath!) than I feel about how he commited suicide himself because he couldn't afford treatment for his cancer and didn't want to be a burden on his family. I'm positive that if a doctor murdered him my father wouldn't have become an alcoholic (who went on to murder a little girl while driving drunk) and my grandmother would have kept her sanity.
Only not because... he's dead either way!
Suicide leaves too many messes no matter how it's done. Death is not dignified. The term "mercy killing" makes want to spit on whoever said it. People kill or support the killing of people like me, disabled people, because it's more of a "mercy" to let us die a "dignified death" than let us live our otherwise happy lives. Disabled and sick people would choose to die instead of live because they can't afford treatment that could manage their illness, can't pay for needed personal assistants and have to burden their family and friends with their care, or want to die instead of going to the disability gulag, institutions- 1.7 million people are trapped there today.