Confounding factors are what allows one to tell appart "the system cause less loss of life" from "the system causes more loss of life yet it is only enabled in situations were fewer lives are lost".

Consider: what I expect is actually true based on the data is that Tesla FSD is as safe or safer than the average human driver, but only if the driver is paying attention and is ready to take over in case FSD does something unsafe, even if FSD doesn't warn the driver it needs to disengage.

That's not an autonomous driving system. Which is potentially fine, but the value prop of that system is low to me: I have to pay just as much attention as if I were driving manually, with the added problem that my attention is going to start to wander because the car is doing most of the work, and the longer the car successfully does most of the work, the more I'm going to unconsciously believe I can allow my attention to slip.

I do like current common ADAS features because they hit a good sweet spot: I still need to actively hold onto the wheel and handle initiating lane changes, turns, stopping and starting at traffic lights and stop signs, etc. I look at the ADAS as a sort of "backup" to my own driving, and not as what's primarily in control of the car. In contrast, Tesla FSD wants to be primarily in control of the car, but it's not trustworthy enough to do that without constant supervision.