There are other factors that influence fatalities in automobile accidents. You can't legitimately use deaths per miles driven as a proxy for how good a driver Tesla's autopilot feature is.
Sure, which is why I said we had no conclusive data. However, at the very least no red flags have popped up in the statistics. Think of it like flipping a coin 3 times and we got heads all three times. That is not nearly enough to judge whether the coin is fair, but we are probably getting close to concluding that the coin isn't weighted heavily in favor of tails. The sample size is still small but nothing in the statistics is screaming out that Autopilot is a big danger when compared with driving manually.
But we don't need statistics to know that Autopilot isn't as good a driver as a human. By Tesla's own statements Autopilot can't autonomously operate a car, it requires a person to be at the wheel and engaged with driving. By definition this means that autopilot is a worse driver than a human driver as it cannot drive at all.
