There are certain countries where this is allowed...but they also have socialized medicine.
Where the doctors can decide that you are better off dead instead of alive...
And the result is that people are now scared of going to the doctor about anything.. especially as they age when catching problems early could have saved their lives.
So...let's just leave things alone.
I'm just a guy who always favors life...not "your best life now or just kill me".
Where there are always some sort of twisted biscuits around that I wouldn't mind removing from the gene pool lest they procreate...but whatever...best not to do it or else they might come for me.