Don't use Title 9 in this discussion in my opinion. When Title 9 was encased it was to insure girls had equal opportunity in sports as boys. When I was in HS the school I attended was like most smaller Class B schools. Boys could play FB, BB, Track and BaB in the summer. Girls had Track and Cheerleading. Can't argue that wasn't fair. Girls BB was added and not long after that VB. There was never any discussion of transgender or I'm pretty sure never even thought that would ever come up.
just because a boy grows out their hair and starts wearing a bra does not make them a girl physically. Medically I have no idea what changes all occur when a transgender completes the surgery and starts taking hormones. In my mind there is no way that most girls can compete physically with boys. If that were true, why are there different world records for each sex.
Don't use the excuse that a transgender has been discriminated against either. I'm sure they have in some cases but that doesn't allow them to discriminate against others to get even. transgenders have the right to be treated fairly but fairly does not always mean treated the same.
Used to coach myself and was an AD for many years, glad I don't have to deal with this issue.