Why are sex workers in Japan and China so confident?

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Sex workers in Japan and China go out onto the streets like that, showing their faces confidently while working.
Although Japanese sex workers wear masks,
Korean sex workers would never go out on the streets like that, even if they covered their faces with masks.
They would try to make money secretly, making sure their faces are never known.
It seems like the sex workers in those countries don't care about what others think.