A sex researcher and former prostitute says prostitution is an addition to the lifestyle, which is probably 50% hyperbole and 50% making shit up, but that's OK I suppose. Like smoking, prostitution is a nice way to legislate people's behavior without actually fixing anything, because neither are considered dire problems. Call it what you will - moral depravity, slavery, addiction - nobody's trying to make anything better, least of all exaggerations like this.