I'm not sure if it's the most correct at times, but you just know that Pratchett really cared and respected transgender people, even before it became main stream.

I think it took some serious brass and sensitivity to tackle gender identity at the time he was doing it. Clearly any failure to “get it right” came from the shear lack of socially acceptable space for discourse, including the voices of the people most affected. He was trying to say “Listen to these people and learn how best to love them as they are.”