That’s not necessarily true. It’s been covered some here. But basically:
1) testosterone levels affect athletic performance
2) The greatest infusion of testosterone into the body is during male puberty.
3) being on estrogen mitigates the effects of testosterone in the body.
4) While research disagrees on the time length, those that are on estrogen hormone replacement therapy will have all competitive advantage of increased testosterone production eradicated within 1-4 years of being HRT - much of the variance has to do with individual levels of T production, receptiveness to HRT, and many other personal factors.
5) Estrogen will decrease muscle mass and increase fat storage in the hips and chest.
6) the only permanent effect of T on the body is the lengthening of vocal chords (lowering the voice, although there can be some change while on E) and the establishment of hair follicles.
So with the above being true:
1) there is no reason for an outright ban on trans athletes. There is room for discussion about how to determine when there is not a significant competitive advantage when on HRT, etc.
2) there is absolutely no reason to refer to trans athletes as cheaters, “trans-women (Aka makes), men who call themselves women, or any of the other things trans-athletes have been referred to in this thread.