I hear this comment all the time, but here’s the problem—there is absolutely NO WAY to keep euthanasia from spreading from the people who freely chose it to persons who can’t speak for themselves.
In countries where euthanasia is allowed, it always starts with like ten different levels of authorizarion and screening and the person has to be in their right mind when they agree to it.
Then time passes, and the criterion get loosened, and people are numb to the idea, then people start to get pressured into it, or are given no choice at all.
So this is a case where for the good of others who can’t speak for themselves, it can’t be allowed for the persons who can.