WRT "Cars are dumb machines" I find it fascinating in this discussion that its assumed we can trivially deploy an AI smart enough to out drive a human, but nobody wants to talk about humans being so dumb they get drunk then go driving after decades of incessant propaganda and punishment. I don't think a species that can't stop drunks from driving stands a chance at creating an AI that can outdrive humans.
Stopping drunks from driving is a political/social problem, not a technical problem. IIDs have been around for a long time, but mandating their installation on every sold car is political suicide in most places (though it seems some countries like Sweden are considering it).