Enticing though they are, such arguments conceal a logical flaw. As a classic 19th-century theory known as a Jevons paradox explains, even if autonomous vehicles eventually work perfectly — an enormous “if” — they are likely to increase total emissions and crash deaths, simply because people will use them so much.
this is at obvious odds with the current state of self-driving technology itself–which is (as i noted in the other comment) subject to routine overhyping and also has rather minimal oversight and regulation generally. Tesla is only the most egregious example in both respects; even stuff like Waymo is pretty much entirely reliant on taking their word for it that the technology would be safer than humans (which meshes awkwardly with well publicized problems and efforts to hide robotaxi safety records).