@LukeAlmighty this is something that can be solved in many ways other than offing yourself. if someone is seriously considering doing that then they haven't thought it through enough. that can be anything from someone spontaneously killing themselves to someone being dissatisfied with their life for the last 10 years and it building over time to the point they kill themselves. the amount of time that has passed is different from the amount of time spent thinking, and especially what that thought was during that amount of time.
but whether or not someone has the right to do it is completely irrelevant. they'll do it whether or not they're legally able to because they won't have to deal with whatever comes later. i do not personally think you have a God-given right to kill yourself. that doesn't mean i can't sympathize, but i don't think it is the right thing to do in 99% of circumstances and suggesting it is someone's "right" to do it is not a safe way to frame it.