[MostlyStable]

As far as I understand it, they aren't being allowed to drive. They are doing the equivalent of "ignore that, it's not a real obstacle" or "try to go around this way", and then the car takes that input into account and does the actual driving (steering, control of throttle/brake) on it's own as usual.

[dataflow]

You're saying they don't interpret road signs/markings/etc.? Or need to know if e.g. a right or left turn on red is legal in a given intersection?

[rcxdude]

I don't need, legally, to demonstrate any knowledge of this to drive on US roads currently (or even, strictly speaking, to know what side of the road I should drive on).

[MostlyStable]

No, I'm saying that no one should be "concerned that non-registered drivers in one country are being allowed to drive remotely in a different country" because they aren't driving.

[agumonkey]

It might be for non road code level issues, like physics / crowd ambiguity, where a normal human could fill the missing gaps, US citizen or not.