There are always going to be fuck ups at some level. The question is whether we’re moving from a world of more fuckups to fewer or not.
Relevant to this example: if people travel by car more because they care less about traffic when they're playing video games or on TikTok during it, instead of driving, overall congestion will likely go up which makes emergency services worse.
As is already the case in cities with robust public transit systems you’d need to make sure you’re applying the right incentives (i.e. taxes and charges) to make sure people are making decisions that benefit everyone. That doesn’t alter the possibility of self driving cars being much safer than human driven ones.
But whether or not reducing injuries at a statistical level outweighs the downside of autonomous vehicles causing accidents (even at lower rates) is a bit of a dilemma.
The road to mass adoption of autonomous vehicles probably wont happen in any poster's lifetime on this board. The reality is most people on here are quite narrow minded and can't 'understand' why it is not as easy as "hey I found a stat that shows Waymo is safer than humans!!11!".