transgender implies a gender is present, which rubs some of us the wrong way.
same/across implies some kind of midpoint and there's plenty of room to be what we might eventually decide to call "cis NB", or since the midpoint is implied now we have three points and that implies a line and somebody might not be on that line at all so saying their gender is across from the one assigned at birth doesn't make sense either.
or it could just be a specificity thing. I'm from "north america" but there's basically never a reason to be so vague when we could just say a country or state/province and binary trans people don't have a more specific label to use or rally around.
I do recall in the late 1990s / early 2000s some HBS-ers rejected the term transgender, but it's a pretty rare thing.
ETA: Some agender and NB folks prefer not to be called trans, but they also don't ID with the cis label so
transgender implies a gender is present, which rubs some of us the wrong way.
same/across implies some kind of midpoint and there's plenty of room to be what we might eventually decide to call "cis NB", or since the midpoint is implied now we have three points and that implies a line and somebody might not be on that line at all so saying their gender is across from the one assigned at birth doesn't make sense either.
or it could just be a specificity thing. I'm from "north america" but there's basically never a reason to be so vague when we could just say a country or state/province and binary trans people don't have a more specific label to use or rally around.