Cars have killed millions of people. Add to that the consequences of electricity, industrialization, urbanization, and even capitalism itself. But billions and billions of people are not only better off -- living lives of outrageous luxury when measured against recent history -- but they wouldn't have existed at all.

Everything good comes with tradeoffs. AI will likely also kill millions but will create and support and improve the lives of billions (if not trillions on a long enough time scale).