A countervailing view of big tech comes from Sean Parker, the first president of Facebook, is a tech billionaire and now a cancer and life-sciences investor and philanthropist. Although he has deep ties to silicon valley and technology, he is not bullish on the ability of big tech companies to transform healthcare. It is just opinion, but he says: “I just don’t think the innovations that are going to drive this revolution in health care and discovery are going to come out of Amazon or Google.” His main insight is that tech people underestimate the complexity of the human body. It may be that his skepticism is predominantly directed toward big tech’s life sciences efforts (such as Alphabet's Verily unit) rather than service and logistics. But Mr. Parker has a long history of deep insights and valuable intuitions when it comes to technology and culture, so his brief comments merit further probing.