There seems to be one very simple (or not, as it were) problem standing in the way of uniting various groups who have sex work as an interest, and it is a problem of semantics and how often the sex industry, and the people in it, is dealt with in a monolithic fashion. For example:
Sex Worker/Prostitute/Prostituted Person/Provider/PerformerErotica/Pornography Hobbiest/Client/Consumer/John