I'd like to think people would care about another's decision to kill themselves, and that others would interfere with that action, regardless of whether or not they have the right to do it. I think you should have the right to choose when you die, but I don't think we should just abandon people who want to kill themselves. After all, we lose more soldiers to suicide as opposed to combat deaths these days.

Also, your second point is really tangential. A fetus and a human do not have the same agency. Couldn't your logic, which equates the two, be used against you? I.e., how do you know the fetus wants to live? How dare you try and infringe upon the rights of the fetus to die? The argument makes no sense, because early on in their development fetuses have no agency.