A similar problem exists with that analysis. Tesla ownership is probably correlated to the amount of time/miles spent in driving conditions where Autopilot is e

A similar problem exists with that analysis. Tesla ownership is probably correlated to the amount of time/miles spent in driving conditions where Autopilot is effective. You also add a whole bunch of other confounding factors if you're not comparing same-driver accident rates. Accident rates vary by location, city/highway driving mix, driver attributes (age, gender, credit score, etc), and probably many other things that may be correlated with Tesla ownership.