Which is going to happen, sooner or later.
Anyone who thinks it won’t doesn’t understand the depths some people will go to to cheat at competition. People will cheat at stuff that doesn’t even matter. The problem is not the majority of folks who are transgender, who like the majority of any group of people are just decent people trying to live their lives. The problem is that there are always a minority of cheating shits will will ruin any game, sport, or competition.
Elite competitive sports is, mathematically, a field of endeavour in which it doesn’t take many bad apples to screw everything up.