+1 a lot of us here are older (or at least older than many tumblr rpers), and we've developed this distaste because we've rped off trans headcanons and found them to be fetishy at best. imo it's worse than self-inserting and using rp as therapy, because on top of being weird it's offensively stupid. i haven't run into it much in dwrp, but on tumblr i used to give people the benefit of the doubt with this, and ran into a lot of people who really didn't want to rp trans characters so much as they wanted to rp really nasty smut that made so little sense it was impossible to read with a straight face. the trans headcanon description was just because they wanted to both work in some easy hurt/comfort and sound like they were above what was basically hentai porn.

(note that i'm not saying you can't want to rp hentai porn, but don't pretend you're some kind of amazing ally by doing it.)