First, Teslas aren't exactly rare. Upthread, someone said 200,000 have been sold (have not fact-checked, but it seems plausible). Second, autopilot related fatalities are covered breathlessly in the media, ignoring all of the other, far more common sources of fatalities, such as drunk driving. And finally, there is no media coverage of the number of accidents prevented by autopilot, which I suspect is pretty high.
Current production rate is 107,000/year, more than 1% of GMs 10million/year.
However, your point stands: Teslas are, at this point, relatively rare.
The answer probably depends on state law and other factors. With autopilot the driver is nominally in control — which is why Tesla aggressively does the PR dance to blame the driver. My guess is that due to the newness and arbritration clauses, they have gotten lucky.
States can change that though — for awhile you couldn’t lease a car in New York because the law let someone injured in an accident due the leasing company!
That’s just an artifact of increased media coverage.
*https://arstechnica.com/cars/2018/07/tesla-sold-200000-cars-...