So that big fat ladies in hog pickups dont slam their doors into the side of their cars, prolly.
I have a car with white pearlescent paint. Ever tried to get a door fixed that some inconsiderate twit dinged? You cant really match the paint with a touchup. You have to take the door off, sand it down, prime and repaint.
Dont get me wrong.. I dont like people who park this way either, but I can understand certain aspects of it.