AuroraSaab
Squire
"There must be fairness to both trans and biological females. They must each have their own category so each group can enjoy fair competition on an equal basis. The field in the trans group will be smaller. If the motive to compete is genuine, competing fairly without a circus of discord is surely preferable. It would allow trans athletes to enjoy sport without distraction."
There just aren't enough trans athletes to make a meaningful competition. You would end up with either no entrants or, say, an event with entrants who were not in any way elite athletes but qualified simply because they were transgender. Plus, there would issues around testosterone levels as not all entrants might be on testosterone or female hormones.
Added to this, those women athletes who are transitioning to male have shown no inclination to take part in the Men's class events. They seem happy enough in the female category, but instead would be forced into a category based on the nebulous concept of gender identity rather than the material reality of biological bodies. (The only exception I can think of is US High school wrestler Mack Beggs who wanted to wrestle in the male class).