Just like some women fetishize sexual abuse in fiction if the perpetrator is portrayed as an attractive chad, others fetishize abuse in gay fiction or just the homosexuality itself in general - as being something better and more “interesting” than hetero characters and people.

Well, the first part of "portrayed as an attractive chad" explains it. You don't see yaoi fangirls consuming bara or bear content; that stuff would scare them. Yaoi fangirls want their yaoi to be two attractive chad-types fucking each other. They're the woman equivalent of the guy who only watches lesbian porn, and they both have the same logic of "it's two hot people I want to see fuck, with no person of my gender in it so I don't have to see someone hook up with someone I can never get; instead I can just imagine they're revving themselves up for me."