>>40106722 (OP)No. Sexologists who studied trans people explicitly through a lens of it being a psychosexual disorder were in fact predisposed to perceive being trans as a psychosexual disorder.
The early sexologists wanted to gatekeep transition, and invented this split in order to separate potential trannies into categories of "makes my pp hard" and "doesn't make my pp hard". This is a historical fact that you can observe through their writings, or probably more easily through a myriad of secondary sources about their writings. If you can handle the slightly more dense narrative, I recommend The Whipping Girl by Julia Serrano as a succinct explanation of the phenomenon and ways in which it still impacts perceptions of trans women today