Are self-driving vehicles really just big, remote-controlled cars, with nameless and faceless people in far-off call centers piloting the things from behind consoles? As the vehicles and their science-fiction-like software expand to more cities, the conspiracy theory has rocketed around group chats and TikToks. It’s been powered, in part, by the reluctance of self-driving car companies to talk in specifics about the humans who help make their robots go.But this month, in government documents sub...