there is one primary right here, and it is the right to agency in decision-making. both the right to die and the right to live come from this more fundamental right to agency. this is true of all of the other examples i cited, as well - every one of them reduces to the fundamental role of individual agency, and if you are to uphold individual agency, it means ensuring that the individual always has the ability to actually make these sorts of choices.
so, don't look at it in this weird way, where we're arguing over whether people should live or die.
we need to give people the ability to choose.