I know it's harping on, but I'm a bit tired of the ongoing meme that XXX people are killed and injured every year (fact) but autonomy will cut this number right down (speculation).
The nearest comparison is with aircraft autopilots: they have to cope with computation and operation at least an order of magnitude simpler than FSD - probably a couple of orders - and are typically triplicated, have constant servicing and monitoring, highly trained engineering and operators. Contrast this with millions of FSD cars on "normal" roads, operated by your average Joe, maintained by ??? and regulated by???. OK, the consequences are much less, but then the hours driven will be hugely more.