It's quite hard if you take into account that machine learning needs 10000x the training data that a human needs, and Tesla is sold in 30+ countries (and used in much more).

I think 3d mapping the surrounding world correctly using multiple cameras (what humans are doing) is more generalizable.

Those are also present in many locations in the US, although they seem to be phasing them out so I think they are considered old tech. I don't know the performance specs, but new cars are a lot smaller and safer than old cars - the same is probably true here too.