Really interesting interview posted by @BonfireLady
indicates how ‘intersex’ was used as an argument by men wanting to be women right back to the 1960/70’s because at the time, DSD was the only legal argument for being able to change sex markers on legal documents.
These men also argued that ‘intersex’ was as much psychological as a physical condition to widen the band width of their argument to include plain old men with fully developed sex organs being able to change legal sex markers. Though the judge back then said ‘no’.
Seems that what they labelled intersex was eventually relabelled as transgender but underpinning the argument, the motive, remains exactly the same i.e. a demand to claim women’s experiences and spaces for themselves.