It's a very free RPG and one adored by autistic males who never had sex. And everyone knows about the incel to tranny pipeline.
They can't use games like Fallout 3 or 4 for trannism since they have a very restrictive protagonist. Morrowind and Oblivion are very ugly for trannys they can't make their porn agp fantasies
Skyrim is pretty popular for agp trannies BUT it also has Ulfric who's a stand in for Trump and Ulfric is tranny repellent so they stay away from that game unless it's to masturbate.