Earlier quoted context omitted.
Not true. Lots of accidents happen in "good" conditions because humans suck at driving. The way you compare, is you give a self driving car to a person, and compare actually usage for that person, and see if owning a self driving car increases or reduces accidents for that person. Being perfect only half the time is still revolutionary.
I have a 100% perfect safety record over probably hundreds of thousands of miles of driving a class B truck with my knees instead of my hands, using cruise control, on straight empty highways in Nevada, Idaho, and Utah, with perfect weather and good road conditions. There's nothing revolutionary about my ability to perfectly drive with my knees...I just very carefully selected the conditions where I was willing to do…
People still crash every day in good conditions. That's thousands of lives that could be saved with our imperfect, sunny weather on the highway only self driving car.
You underestimate how bad human drivers are even in perfect conditions.