FWIW my guess is there probably wouldn't be any downvotes if you just wrote "is a girl/woman".
Personally I don't care about the difference but just mentioning "pronouns" seems to be enough to trigger the downvote reflex - "pronouns" has been abused to create so much drama the last few years that I can kind of see why people react even if I don't do.
Not sure what I should've expected given the average user of HN.