I think the basic struggle for minorities is for others to understand that they are just normal people. They're saying "Yes, I am [black/muslim/gay/trans/etc.] but get to know me and you'll find out I'm just a regular, decent person like you."
Being a filthy pervert is not a category you can reasonably swap into that bracket, especially when your personal fetish straddles the line of such a powerful taboo. You can be a guy who wants to live as a woman and come to work dressed professionally and be a part of the system, for instance, but people sitting in a diaper full of their own feces with a hard-on have nothing to offer society.
Bria defends her disgusting friend by saying Labelle is brave to share this with the world. Is it equally "brave" to announce to the world that you are zipper-mouthed leather gimp, because what's the difference besides being a gimp doesn't invoke the specter of pedophilia?