Your number 2 is gatekeeping and not entirely true.  A huge portion of the population today suffers from intersex conditions. With modern medicine most freemartins, in utero ftm, can live a "normal" life as a "male". Strats, chemical eunuchs, castrati, swyer syndrome xy "females", are much less like real women and they need in vitro and c section, if they can get pregnant at all.  Lots of high level bapphos are just cross dressers, though. The eunuchs are a lower class because they rely so heavily on the system.