I think that fact could be reflected in his use of coffee enemas to treat his pancreatic cancer that was easily treatable with chemotherapy which the coffee enemas ultimately resulted in his own death.
Let's not get carried away here.
"According to the American Cancer Society, for all stages of pancreatic cancer combined, the one-year relative survival rate is 20%, and the five-year rate is 9%."
And don't forget, Steve Jobs died in 2011, which means treatment was being received for years prior. That's 12+ years ago.
Did his choices hasten his death? At least one oncologist thinks that "the end result would probably have been the same"[1]:
"Had he been operated on then, would most likely would have happened is that Jobs’ apparent survival would have been nine months longer but the end result would probably have been the same. None of this absolves the alternative medicine that Jobs tried or suggests that waiting to undergo surgery wasn’t harmful, only that in hindsight we can conclude that it probably didn’t make a difference. At the time of his diagnosis and during the nine months afterward during which he tried woo instead of medicine, it was entirely reasonable to be concerned that the delay was endangering his life, because it might have been. It was impossible to know until later—and, quite frankly, not even then—whether Jobs’ delaying surgery contributed to his death. Even though what I have learned suggests that this delay probably didn’t contribute to Jobs’ death, it might have. Even though I’m more sure than I was before, I can never be 100% sure. Trust me when I say yet again that I really, really wish I could join with the skeptics and doctors proclaiming that “alternative medicine killed Steve Jobs,” but I can’t, at least not based on the facts as I have been able to learn them."