I believe that they are trying to comment on the issue at hand rather than the person itself.
You may say that Fallon Fox will never make it in the big leagues, but if transexuals are approved to fight in WMMA, then surely that would mean more transexuals will be appearing in the WMMA scene. Who knows, there might be a legit talent amongst them. Then, should they be allowed to fight in the UFC? The women's champion doesn't think it is fair to for females to fight transexuals, should the champion be forced to fight one since transexuals are approved by the commissions and all the regulatory bodies?
Lol, would love to see Rousey fight Fox.