Is it "having a job" to be required to say "I'm sorry you feel that way, but I'm dedicated to meeting your needs. Let's see what we can do to help you!" in cheery tones after the customer says "you stupid [racial slur], your mother should've aborted you, why can't you get it through your [explicitive] [racial slur] head that I want [thing that was never mentioned, and is, in fact, illegal]"
THAT is the forced courtesy we're talking about.