women compete in...as she says...‘It’s Complicated and People Don’t Like Complicated’...e.g. it's not enough to reduce one's testosterone level...in swimming for example, if the trans person has already benefitted from a puberty growth spurt in size and muscle, they have an advantage, so 'Timing' matters...and one blanket ruling does not cover all competitors.
None of this, btw, is any justification for marginalizing and ignoring the genuine needs of trans persons...Donna agrees with this as well.
Link: https://www.swimmingworldmagazine.com/news/donna-de-varona-transgender-swimming-dialogue-must-continue-its-complicated-and-people-dont-like-complicated/