Ignoring the the moral bankruptcy of the argument to begin with, he's someone who most people would consider a societal "loss" despite his views around alternative medicine.
We would have felt differently about him if he had published a book titled "iCancer: How I Beat The Disease Using Alternative Medicine".
(FWIW if Jobs had devoted an inordinate amount of time to encouraging his audience to follow quack cancer cures it would be a stain on his reputation but wouldn't diminish the value of his separate contributions to UX or consumer electronics)