We live in a cynical world TWC and TS are often NOT seen as humans, because of that, the lovely souls that would be open to date a pre-op TS are not let the chance to express their feelings.
I think, the ->-bleeped-<- ->-bleeped-<- label comes from men (mostly) going into places where pre-op TS are known to be and specifically targetting them on the internet or in gay clubs. Knowing men... How sex is a driving force in them and that many don't want to be seen as gay for whatever reason and like the plausible deniability we offer.
Unless someone is unpassable, I don't think there is a big chance of randomly meeting a T-->-bleeped-<- on the street. So, if you meet somebody there, you tell your "big secret" and they shrug it off, there is a good chance they like you for you, not because of the dangling bits...