This is important, because it enters into the subject of: The right-to-die.
-- And the key point here, is that it's absolutely ridiculous, that this term (right-to-die), even exists.
Ie, the very fact that it exists, means that some people believe, that they have the right to keep someone alive, even if that person wants to die.
And, of course, if someone wants to die, and they're being forced to stay alive, then the reason for keeping them alive, is inherently selfish.
Ie, for the moment, let's forget about the word immoral, and just focus in the word selfish.
-- Basically, it's irrelevant what reason is given (to keep them alive), because that reason, is one that will be inherently selfish, since it is to please them, and not the person that wants to die.