i have the interim solution until people grow up.
we will make an added division for sports and call it the "coed" division. many sports have coed leagues for adults, where men and women play together. everyone can play, no one freaks out about boys and girls same field.
trans? gay? wheelchair/handicapped? special olympics? bored of being stuck on JV and just want something different? varsity says there's no room left? got a little rebel in you? go "coed."
it solves so many things and it'd probably be a joy to watch. we play 1 more soccer or whatever team game in addition to varsity and JV. we add a heat or so to events at track meets, when coed kids want to enter.
and if the bigots oppose it and start ranting again, their pure as driven snow 10th placing daughter is clearly safe in "girls," we have removed that excuse, and it's crystal clear they are just being bigots trying to make certain kids' life hell.