Personally, I find the idea of "future selves" separate from your current personal identity a compelling enough idea that I think I at least owe them a chance a

Personally, I find the idea of "future selves" separate from your current personal identity a compelling enough idea that I think I at least owe them a chance at life even if I theoretically may have a right to take my own right now. So, killing yourself to me is only justifiable in situations where you'd be justified in killing somebody else. Sacrificing yourself to defend somebody else could be thought of the same as killing in self-defense, euthanasia is justified, etc. This isn't at all to push blame on those who consider suicide or have gone through with it, or to completely abandon the idea of a continuous identity, just a perspective that once I adopted I couldn't shake.