Only people have been driving themselves for a century, and have a pretty good idea of how safe it is, including how safe it is for them and their skills / city / etc, as opposed to some "one size fits all" average.

>(sure isn't statistics)

Well, it can't be statistics because all we've got is the BS "statistics" from the self-driving car companies. Only a sucker for new technology would accept those, as there are tons of differences between regular driving. They take the cars out at optimal conditions (not rain, snow etc), they drive specific routes (not all over the US), they often have supplementary humans on board to check (do they count the times when humans had to take control and saved the day as "self-driving accidents" or not?), and tons of other things besides.