I don't think a detransitioner will make nearly the same impact as a few more Liar Thomases. Disgust and anger towards people who take advantage of others is far more powerful than sympathy for people who fucked up.
If Liar Thomas had stuck to a sport that wasn't something that suburban wine moms could see their sweet little mini-me's someday participating in, like MMA, no one would give a fuck that he took a girl's trophy or scholarship. Fallon or Alana nearly kills his opponent? BFD, they don't care. After all, their daughters would never participate in such a violent sport. Weightlifting, like that NZ dude? Not for their sweet girls, thank you - they're ladies. Ladies don't do that.
Same thing for the rapists who decide they need to express their true femininity in prison, and just happen to rape some of their fellow inmates while they are there. They don't know anyone who went to the Graybar Hotel. The only prisoners they ever saw were on "Orange is the New Black", and the tranny on that show is so pretty, you know! (They don't give a fuck what happens to real women who end up in jail, anyways. They're obviously NOKD.)
If some other troon decides to go for tennis or gymnastics, however.....those Karens are gonna notice and gonna be pissed off when they start showing up on the podiums with medals and trophies.
Trans women are hecking valid, until they take cash or trophies away from their little dumplings. Or they rape a classmate in the school bathroom in an upper middle class neighborhood, like what happened in Virginia.
Trans men are men, until no one wants to date their dainty "Aiden". Or they have to help "Aiden" change their dressings, and look at the horror in "his" crotch - while all their old classmates are off to grad school, starting a career, maybe getting married. And then "Aiden" needs more and more revisions......
Bring on the Liar Thomases, the Emily Whatsisface on Terf Island, and yes, even that bloated sack of goo called Rhys. A few more hulking cheaters pissing off the Karens should do it.