No, no they're not. We have some lane tracking in good weather etc., but we are still decades (or more) away from full level-5 autonomy that would make drivers behind the wheel unnecessary.
But it only goes to show that not even computer science experts are immune to marketing hype and well funded PR campaigns. :)
As for the unreasonable ineffectiveness - it's not just in systems research. ML can be very effective in some areas (especially when there is a ton of training data), but many areas of human endeavor are hard to model via function approximation techniques like those used in most of ML.