I think that has more to do with the massive power asymmetry, because a service worker is generally expected to smile and take it. They don’t represent someone who humiliated the angry customer, they represent a punching bag.

Completely off topic, but 100% this is why people are awful to service workers.

I worked retail management while finishing post-grad work to pay bills. People who were loud and awful always had something else in their lives that was making them mad - broken down car, not much money, shit job, etc - and they used the retail employee as a punching bag.

I never saw one person who was loud have a reason to be loud other than that. In 10 years.