Telling your son not to “be such a girl” lets his sister who overhears the conversation know that being a girl is not a good thing and she should be sorry and ashamed of herself.
It also reminds your son that being a boy is better than being a girl and therefore he is better than any girl he will ever meet.
if the creator has to say “yeah this one vague line was refering to this character being gay” it doesnt count as representation. if it’s a punchline at the end of the movie, it doesn’t count as representation. if the writer announces it outside the work but never in the work it doesnt fucking count as representation