I agree that these are just opinions and not facts. The narration is not really clear about who is stating this.
I read it as a statement by the author... and also started to loose interest for the immaturity of it.
But a confused boy could probably think in these kind of cliches "I’m not interested in drag, drag queens, sissyfication, show tunes, Judy Garland, gay bars, limp wrists, whining, anonymous sex, or men’s fashion and trying to be fabulous."
So, I'll just pretend it was Matt's thoughts and enjoy the story further