I can see that...
I mean, Joe Rogan (Fight commentator) says that Fallon Fox is a man and dislikes the idea of men fighting women...
Versus:
Joey the fight commentator saying that Fox Rends is a man and dislikes the idea of men fighting women...
This one wasn't psychic though. (Wait, am I claiming that some of the things in various books might me? Well, I can't back that. If I wrote one or two books and that happened, then it would be a sign. Write a hundred books and real things are going to eventually match up...)
Now, I did hit the theme of trans women competing against women as a big deal. We're seeing that in other sports right now, as a major factor. Again, that one wasn't too hard to see as something about to emerge.
After all, if a trans woman was always a "real" woman to the minds of some, then those people have to insist on things that would otherwise not make sense. (I'm not proclaiming them right or wrong here, just saying that you have opposing sides in the issue.)
Then, I think I gave my answer in the books. If women know they are competing with someone who used to be a man and are willing to do so, then it isn't a problem.
A major difference here is the fictional Fox Rends always fought as who and what she was. A man that was a woman inside, who transitioned.
Fallon Fox snuck in, hiding that she might have an advantage and didn't take the high road that way. If trans women have some advantages in physical capability over the other kind, then that is cheating.