in the books Brienne wants to be a knight because she has a huge crush on Renly, but she's too ugly to be a lady of the court. she isn't gay.
and example this is a prime example of how LGBT try to usurp existing narratives to suit their own perspective, instead of sharing new perspectives.
You got the Brienne thing backwards. When the character first appear in the GOT series she was labelled as "ugly" "tomboy" "manly" a "rug muncher", a "dyke"
So some collectives, LGTB included, use her as an example of how a woman in a traditional manly role and with a particular look can be unjustly labelled by the society even tho the character was not gay from the start. Also how a manly woman is characterized as gay and it´s used as a pejorative with prejudice.
