I mean, compared to a ciswoman, a transwoman is a borderline superhero. Unless they started transitioning at age 5, they're going to have an unfair biological advantage.
It's unfair to transwomen and I hate that. (Life's already been unfair to them by sticking them in the wrong body from the get-go.) But if there's legitimately no way to level the playing field for everyone, then it's better to be unfair to a few than to be unfair to the majority of athletes.
I agree with this. Life is unfair to people who are forced to compete in the special Olympics too, but they found a way. Something similar might work.