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)
For Jobs at least the certainty of death made him accomplish more in life and so if we define "deadly" as lethargic (which I suspect is what the author meant) made his life less deadly.
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.