The bioethicists have ready worked out the kinks of assisted suicide laws and I would defer to them. You don’t offer it to people who cannot make the decision, you make sure people are fit to make the decision before they become too impaired, and you have plenty of checks for elder abuse, family pressure, and so on. Ultimately right now I can choose to end my life and that knowledge has made bearing some really painful medical things much easier.
We can all do things that make us less safe. We can drive, we can eat unhealthy food, we can drink alcohol, we can smoke, we can have unprotected sex, we can go base jumping, and so on. There is a concept called Dignity of Risk, meaning that while we have a duty of care, a responsibility to protect someone, we also have to respect that person enough to let them make choices, including choices we disagree with. If we don’t have this then we treat people as less than human and in the process we are stopping them living the life they want.
If we are going to say life choices should be in your hands then I think death choices should be too.