I’ll assume you haven’t been close to people in the last stages of some of the crueller diseases such as MND/ALS.
My opinion on the issue was already strong, but seeing people die after long diseases and people around them talking about "unplugging" them is what made me certain I do not want euthanasia.
My grandfather wanted to live even with half a lung functional and painful breathing.
Do what you want with your life, but please don't decide for others.