It seems to me that we have to start from the very start with this emerging debate. Nearly all sport is protected. If you want to enter the 100m in the Olympics you must at the very least be a Homo Sapien. To enter the womens 100m you must be a female Homo Sapien so there is an extra requirement for that race. You are not allowed to enter if you are a cheetah nor, in some hopefully never to arise dystopian future, will you be allowed to enter if you are 25% cheetah or even 2% cheetah. You must be 100% homo sapien and it follows that in the womens race you must be 100% female homo sapien and in both cases that includes your chemical make up as well as your physiology.
The only reason for any of this is that we are interested in the best runners, the best tennis players and the best sports performers in general-no other reason at all and no one is entitled to be a candidate unless they happen to fall into the categories mentioned-namely to run 100m in less than 10 seconds while still being 100% homo sapien. We are most definitely not interested in seeing a heavy weight beat up a flyweight and we are not interested in seeing a female having to compete with a person who is not fitting into this category 100% or whatever is the nearest standard to that which we can reliably discern. On the other hand it appears that if you want a long career in sports administration being a jackass is your best bet.