IMO, the damage occurs because many people just don't care anymore.
If you have a car 'valeted' (yeah, right) at a typical garage, the following happens:
'Valeter' takes your keys from the service board....then drops them on the floor, damaging the key plip finish.
He/she locates your car....which is rather close to the car next to it. You know what's coming....valeter opens your car door, and within the blink of an eye, he's scored 20 points by not just chipping the paint on your door edge, but by denting the other car's door in the process......he/she is doing a stirling job so far
Now, they 'drop' onto your seat bolster, sit there for a while, just to make sure that it's fully crushed, then they slide into the seat, and pull their feet in.......but not before making sure they have dragged their grit filled shoe soles across the sill trim.
At this stage, your seat and mirror settings will be adjusted beyond belief.....for no apparent reason
Right, so the car is started, and we're off to the wash bay.....yeah
The jet washer is fired into life, and a high pressure jet of water and soap is at last sweeping it's way across the paint work. After a minute or two, the valeter realises that one of the windows is open
......hey, never mind..."it'll dry out".
Now, their mate strolls up, and the valeter enjoys a 5 minute chat, whilst standing in one position with the jet wash wand, unaware of the fact that it is doing it's best to remove the numerical badging that it is focused upon.
If you are LUCKY, the pain will now stop, your car will be left, and locked.
However, in most cases, your pride and joy has to endure the same half witted process, but in reverse, as it is taken to a parking bay.
Do I trust anyone with my car??......no!