So to drive with FSD is 8x safer than your average human driver.
WITH a supervising human.
Once it reaches a certain quality, it should be safer if a human is properly supervising it, because if the car tries to do something really stupid, the human takes over. The vast vast vast majority of crashes are from inattentive drivers, which is obviously a problem and they need to keep improving the attentiveness monitoring, but it should be safer than a human with human supervision because it can also detect things the human will ultimately miss.
Now, if you take the human entirely out of the equation, I very much doubt that FSD is safer than a human at it's current state.