There's only one problem: Harry Benjamin had nothing to do with naming it nor with its conception, it has no basis in science and no current or past expert advocates it nor promotes it.
Harry Benjamin's sole aim was to help his patients and over the course of his lifetime he treated close to 2,000 of them. This experience is what allowed him to develop his gender disorientation scale. If you read "The Transsexual Phenomenon" cover to cover you will see no mention of who among his patients was a woman and who wasn't because he was treating dysphoria. Consequently, he ended developing his disorientation scale where hormone therapy and surgery was the required intervention for the most extreme patients (namely types V and VI).
HBS transsexuals however, prefer to believe that gender dysphoria is not graded. Therefore the patients below them on the Benjamim scale who either did not transition fully, lived part time or crossdressed were either perverts or freaks. All of this thinking developping well after Benjamin's death.
Why do some of them believe this? because in the absence of this tenet, they believe their whole legitimacy as women might be called into question somehow. I don't entirely follow the logic myself but this is what some believe. They alone are suffering from a complete psychosexual inversion while the rest of tbe pack are men in dresses.
The work by Ray Blanchard seemed to help their cause at first because the Autogynephelia concept seemed to support the idea that gynephilic dysphoric men were driven by an erotic impulse to become facsimiles of women but then he also had to theorize that his androphilic patients were simply homosexual men looking for heterosexual male partners. Therefore his work could not be espoused either. For Blanchard all transsexuals are men.
This blog supports now and always has supported transitions for people who need them. It does not support crackpot theories by frustrated transsexuals who need to validate themselves by disparaging others.
HBS trannsexuals are all but completely discredited now but you will still find the odd fringe blog out there in cyberspace.