Also, even in rule-abiding Germany, some traffic laws are seen more relaxed than others. For instance, the law says that at a stop sign, you need to come to a full stop, but you will see that most drivers don't do that but just drive very slowly (if that...). Likewise, the law says to keep 1,50m distance from bikes and motorcycles, but in the above mentioned narrow streets, that would also often mean that you will not move at all for a long time. I would guess that FSD would need to abide by traffic laws just for regulatory purposes, and that would make you look like an idiot in many cities...
That's not even to speak of countries where traffic laws in general are more like suggestions...