It has little to do with an "inviolable right to self ownership" -- the overwhelming majority of the world already have that. You can eat until your jaw breaks

It has little to do with an "inviolable right to self ownership" -- the overwhelming majority of the world already have that. You can eat until your jaw breaks while dedicating your life to proving a flat Earth, you can go base jumping off a cliff, or you can tattoo obscenities on your forehead. Or all of it at the same time. And it's perfectly acceptable as an action of autonomy and self-ownership. Euthanasia, or suicide, is instead a problem of diminished capacity and whether or not suicide could ever be a decision of someone who is of sound mind. Much like we don't let babies walk into traffic, believe that a 9 year old is able to consent or allow severely mentally handicapped people the ability to refuse surgery -- having legal frameworks that don't encourage these things isn't about stripping away the right to self-ownership.