It's not about touching the same things. It's about potential violence. A person who is sitting in a car has to go through two windows and rise from a sitting

It's not about touching the same things. It's about potential violence. A person who is sitting in a car has to go through two windows and rise from a sitting position to attack someone inside. A pedestrian can be facing the window directly and grab with both hands. If a driver pulls a gun, the employee can duck. A pedestrian can lean inside and shoot them anyway. A person in a car necessarily excludes the possibility that there are accomplices hidden just outside of employee view. Pedestrians, not so much.