In an unexpected bought of compassion....
To be fair to the washers, they will probably be paid on a piece rate or are instructed to do X washer per hour or a set time per wash e.g. 7 minutes or some other wholly inadequate quota. The only thing they can do in this time is throw a bucket of water on it and rub in the grit.
Don't blame the washers; it's Dealership/Group management that understand that most people they see don't give a hoot about their car, probably because it is company provided or lease, and therefore a shed load of surface scratching and marring doesn't hit anyone in the pocket at car return time. Everyone else is probably a minor part of their business model (turnover wise), and therefore a minor consideration.