OK, I've considered that and determined it to be mostly wrong. While drone failure is an acceptable outcome, current technology still doesn't allow drones to be as safe as equivalent crewed aircraft across the full range of flight operations. Maybe in 50 years we'll get there.

Sure current tech does not allow us to safely automate flights. What I wanted to get at is that tech that doesn't need developing does not get built. Looking at drone failures does not tell us the max safety they would reach if we focused on that.

Obviously a droneliner would look very different from the jets that are common today.