So many things to unpack here. Please keep in mind that Tesla and Musk are masters of misrepresenting statistics out of context.
So, when you said that "Tesla cars" kill humans at a lower rate than "human drivers", could you provide a source for that? Or did you mean the regular claim by Musk about teslas being safer by 100% than an average driver, which means that an average tesla car while running autopilot in almost always highway conditions in almost always sunny conditions has lower fatalities than the average human driver, who will skew older and more accident prone, driving on average roads, in average conditions, with the average 10 year old car with less safety features.
Never in any of these statements have i seen any discussion of pedestrians deaths, but it makes sense right? How many pedestrians are on highways where autopilot is mostly used.