Without death we cannot truly have life. As such, what a travesty of life it would be to achieve a machine-like immortality!
Gray writes the following chilling lines: “If you understand that in wanting to live for ever you are trying to preserve a lifeless image of yourself, you may not want to be resurrected or to survive in a post-mortem paradise. What could be more deadly than being unable to die?” (my emphasis)
via.
Sounds like sour grapes. I'd heard of people holding such sentiments; this is the first time I've actually seen them expressed myself.
For me, it's the irreversibility that's the real issue. For any situation that would warrant pressing the suicide switch, would it not be preferable to press the analgesia switch?
Not necessarily. If I believed that my continued survival would cause the destruction of everything I valued, suicide would be a value-preserving option and analgesia would not be. More generally: if my values include anything beyond avoiding pain, analgesia isn't necessarily my best value-preserving option.
But, agreed, irreversibility of the sort we're discussing here is highly implausible. But we're discussing low-probability scenarios to begin with.