Girls selling themselves in Thailand was an occupation long before the Americans arrived but it is China who can be labelled "the hub" based on the link below, followed by India, so given that, I don't think there should be too much concern regarding American influence here.
https://metro.co.uk/2016/01/11/can-you-guess-which-country-spends-the-most-on-prostitutes-5615906/#:~:text=In terms of number of,United States with 1 million.