Pictures are expensive (data wise), and on-device facial identification is not very accurate, especially at a distance in a variable environment
Cameras inside the vehicle? Those might be worth mining for data. You can easily detect if there's a person in frame, and snapshot all the passengers. Insurance and law enforcement would be interested in that
Cameras outside? You could search for human faces or license plates and upload them off peak hours... But how much is that information valuable? What percent of the time is a car even driving? Is palantir even set up to ingest that kind of disparate moving data sources?
Flock cameras just yield much more useful data... They're designed to sit somewhere and capture those pictures. Even if public outcry gets them removed, they're just going to wait until the public gets bored and then put up less noticeable cameras... We really need to fight this forever
All that being said, I have a car with no cameras and I'd only budge on that if the car reliably could drive itself. I don't like having cameras pointed at me