I think people know that and wouldn't rely solely on a prostitute's word, especially when there are other legal certification services.
Would you buy a electrical appliance that was not certified by Underwriter's Laboratories? Or buy a car that had no crash test rating from the Insurance Institute for Highway Safety? Would you take the word of a car company that "oh, we don't need that stuff. we done tested it ourself."
It seems humans do know how to solve safety problems without coercion, at least when allowed to. There is no reason to believe prostitution is any different.
Would you buy a electrical appliance that was not certified by Underwriter's Laboratories? Or buy a car that had no crash test rating from the Insurance Institute for Highway Safety? Would you take the word of a car company that "oh, we don't need that stuff. we done tested it ourself."
It seems humans do know how to solve safety problems without coercion, at least when allowed to. There is no reason to believe prostitution is any different.