It is literally incorrect. Trans women DO NOT have an advantage in sports. Transitioning fundementally changes the body, reducing muscles, bones, and more. Trans women are at a disadvantage if anything.
A 2024 paper published in the British Journal of Sports Medicine added to increasing evidence that transgender women are not naturally advantaged after transition. The paper, comparing transgender women, cis women, cis men, and transgender men who compete in regular competitive sport, found that transgender women had lower lower-body strength and reduced lung capacity than cis women . Bone density was also equivalent.
This study verifies what was reported by the Canadian Centre for Ethics in Sport (CCES) in 2024: that trans women who go through testosterone suppression and gender-affirming medical care do not possess a biomedical edge over cis women in sport. The CCES review of a decade’s worth of peer-reviewed research advocated for evidence-informed policies, rather than ones driven by prejudice or fear.
Yes, no trans woman is going to detransition for sport.
And if they are post op they are not even going to produce any testosterone and would be at an even more severe disadvantage due to having no sex hormones.