Anybody testing autonomous vehicles has this data. They just have to send it in.
Given that we know existing car manufacturers have faked or covered up safety data in the past, you're putting a lot of faith in the goodness of tech companies.
https://en.wikipedia.org/wiki/International_Council_on_Clean...
...I'm the one questioning the utility in of California's system of control. My faith in either actor's earnest participation is therefore not of much use.
I do know customers value safety and honesty of companies they buy/use cars from, and so do the investors who back these companies. Which are the people who keep these companies in business. That pressure exists independently of these permits. Which is why one must realistically question the utility of special government oversight.
Additionally insurance and drivers licenses are already regulated.
I'm still not convinced of the necessity. The hammer is always looking for a new nail.
The bar for expanding bureaucracy and adding highly specific oversight is so low and so commonplace that you're labeled a techno-libertarian for questioning the basic economic cost (realistic benefits vs tradeoffs) of doing so.
You may feel more comfortable knowing someone is watching over these specific companies testing process. That doesn't automatically mean the world has been made safer as a result of their time spent writing complex legislation, building regulatory systems, enforcing it, slowing down development of technology, battling cases in court, pushing companies to other states/countries, etc.
Unfortunately questioning the realistic utility of such regulation is no longer the default and is dismissed as the foolishness of some silicon valley tech people disconnected from real life...