Most self-driving is done in warm climates, in a circle. These companies are amassing thousands of empty miles on the same streets every day to impress people who don't know any better.
I lived on a branch of the main Google circuit, and often they were the only traffic for most of the day. Even saw three Google vehicles in a line, but two were more common.
What's the value of "self-driving" with no weather, traffic or route variation? PR and regulatory filing stats.
Last time cruise made a report about disengagements (where the safety driver had to take over) it was one every 5000 miles driven. That's 1 crash the car was prevented from every 5000 miles. Humans crash once per 70000 miles.
Waymo cars go 11,000+ miles without driver intervention on average.
I would encourage doing actual research into this subject, rather than relying on your gut or the news articles you read.