Earlier quoted context omitted.
This is mostly applicable if there is no sudden lane change. True you should always keep a safe enough distance for you to react and brake in any case with the car in front of you. If that car was too close on another lane, switch to yours and brake simultaneously this is a bit different.
The whole scenario would look very similar if the Tesla was a car suffering from a breakdown and moving to the safest lane it can reach safely. In such a case we would also expect other drivers to pay enough attention to prevent an accident like this...
Most drivers gain an instinct to passing slower/stopped objects on the left, and a natural aversion to passing them on the right.
The Tesla pulled over and stopped in the far left lane. No “space” was left to pass it.