The difference between "some" and "every" is not semantics, but whatever dude.
Sure it is. You are using the literal distinction between "some" and "everyone". I'll assume you know that "everyone" is used in passing and not in the literal sense all the time in common conversation and more often than not should not be taken literally. It's a simple issue of semantics, or perhaps connotation more so. Why you are hung up on this is strange and comes off as defensive.
But more to the point, where did I state that EVERYONE has experienced this? You said that, not me.
Guess what? You and your kids have all shared a locker room with a transgendered person at some point. And it will happen again and again and there's nothing you can do about it.
I am not disputing that it is likely more common than most people think. But actually some informal polls among my family and friends would indicate it is far less common than they all think. But I still dispute the unqualified claim that EVERYONE has been in a locker room with such an individual. All absolutes are the work of the devil!
Piss farther, dude.