Aside from those massive numbers of dead pedestrians. (Edit: not that I think autonomous cars is the answer - but it's clear that regular cars are a problem)
I hear you about pedestrian deaths, but the numbers aren't actually that bad (accepting some level of accidental deaths will occur no matter what we do).
Cyclists coming in at 857 in 2019 and people on foot coming in at 6,283[1].
That's not too trivialize those deaths... but from what we've seen so far, I'm not convinced self-driving cars are going to do any better.
First off, yes. It's a big country so figures like that don't mean a whole lot. I wager I'm more likely to be killed by cheeseburgers than by a car. 50,000 cheeseburgers are eaten every three seconds in America.
But another thing: if Tesla were really trying to save lives, they'd have this software turned on for all their cars. That's not what they're doing. Rather they're selling activation of this software for thousands of dollars. They're selling a luxury product.