Simple, why didn't your son identify as a year or two younger and he'd be the tallest GK again.
If birth gender is fluid, why not birth year? After all, isn't it compassionate for the undersized kids being dominated and bullied in their birth year group? Wouldn't it "level the playing field" for those born smaller, weaker, and less talented? OR think how one could dominate due to physical difference competing one or two years down.
Personally, I'd like to identify as 62yo and start tapping into social security.
Ultimately, who gets to determine the rules and where does it end?
The NCAA decides its rules. The IOC decides its rules. ECNL decides its rules. Each HS sports governing body. That’s how things work. Sports governing bodies get to set their own rules, so long as their rules don’t break laws.
You know who doesn’t decide the rules? You. You’re just a sore loser. If you want to start the bigoty sports league, go for it.