Because fairness is determined by deciding who is more 'marginalized' according to the official narrative, then 'centering' them (meaning they automatically win over less marginalized). Evidence is then correct when it supports the pre-determined conclusion (TW have no unfair advantage) and if it doesn't, it must reflect the positionality of the oppressors who produced the evidence, and is therefore wrong.
Regarding the highlighted....
Two things that cannot be true at the same time:
- Males (men) have an advantage over women.
- Trans-women have no advantage over cis-women.
If trans-women, who are biologically male, have no advantage over biological females, there should be no statistical difference between male and female populations. "Populations" is an important word here. the range of capability of the populations may overlap, but they are statistically separate populations. If that were the case, it would
not suggest that trans-women should participate in female leagues, but rather that there should not
be separate leagues for women/females.
But we know that there
are statistical differences between the male and female populations. What would need to be demonstrated is that trans-women are part of the female population rather than the male population.
I'm not entirely opposed to that happening on an individual basis. How this could be done, I don't know. I'd leave that up to leagues based on scientific estimates of the effects of treatment on relevant performance.
This is somewhat similar to positions put forward by LondonJohn, except he places the onus on leagues to cite evidence that they
do have an advantage. I take the opposite approach. My reasoning being that there are rules in place due to population differences (male/female). A trans-woman is still biologically male and is therefore asking for an exception to the classification system. They must demonstrate to the satisfaction of the league that the transition process has affected them in such a way as to merit reclassification. And remember, transition is a process, not a point event.
In shorter terms, if you are asking for an exception, you need to be able to justify it based upon the rationale of the rule you are seeking exemption from.
And it becomes hard, because such justification could easily amount to "demonstrate that you have no chance of winning."