At least in large metropolitan areas with high rise valet garages. An attendant was killed in an accident this week in Manhattan. The story is here. He parked the car on a lift and perhaps forgot to set the brake. When the lift rose, to its extended position, the car rolled off and crushed the attendant.
I’m told that accidents are not unusual in valet garages. Cars are driven on and off elevators (in June a SUV was driven through closed elevator doors and crashed down on the top of the cab, two attendants were hurt.) and in many garages man lifts are used to more attendants around the facility. These can be dangerous as sometimes attendants, in order to speed up the process, will override safety switches.
My New York information source told me that riding on a man lift was one of the most terrifying moments of his life.
Yes, accidents happen and of course we mourn for the families of those killed and maimed. However in most cases, these accidents happened when procedures put in place to prevent them were ignored.