Because those are supervised.
That is why Tesla very closely tracks disengagement rates (according to the biography). When that gets to be better than human accident rates, they will declare supervision is not needed. That is still very far away as I keep saying - currently the disengagement rate is around 1 every 10 miles from crowd sourced data. When it gets to 1 in 10,000 miles, we are getting to unsupervised levels (1x human level). At that time Tesla can start robotaxi like service with remote assistance like Waymo.
When disengagement rate is 1 in 100,000 Miles I.e. 10x human level, Tesla can let you sleep in the car.