That’s really not the same thing. Very skillful lightweight boxers don’t box with sluggers in the heavyweight category because they would regularly end up dead. Similarly there could be plenty of skillful women who are separated from boxing men because of the anatomical advantage that men have. If a woman
wants to box men, or a 60 kg man wanted to get in the ring with Tyson Fury then my take would be “hey, it’s your funeral!” But I think at the very least we need to be skeptical if Tyson Fury decides he is in the early stages of transitioning to female and now wants to box as a woman.
Similarly, in something like powerlifting, a very average man with a bit of training could bench press 100 kgs. In any commercial gym there will be several men capable of lifting that. For women, that’s only really possible for elite women, and some of those compete in non-tested competitions which suggests the use of steroids. There is no way that women can compete to win if those with the advantages of a male anatomy and a modicum of training compete with them.
https://strengthlevel.com/strength-standards/bench-press/kg