The head spinning and screamning isn't because they have to do it, it's because if they list their prices, they will be consistent.

There's all kinds of ways for upcharging, depending on a person's income, the way they dress, what kind of insurance they have, etc.

By hiding their prices, they can charge up to ten times more for certain clients for random reasons for the same procedures. This is gonna make them not happy. And it makes me dance for joy.