Comment by fallingfrog

The other part of this is that smiling when you don’t really want to, at people you don’t really like, as part of your job, is really exhausting. In the United States labor and especially service sector labor is very disempowered so they don’t really have the option to refuse to smile. In places where labor has a bit more leverage they might be able to. There’s also a special voice you put on, the customer service voice. Culture is often downstream from material conditions.

https://youtu.be/A47SSXdUdvw