"if what you worry about is which toilets and changing rooms people use, then "antediluvian" is too kind a word for you."

"There was no name-calling and no insults."

Steve, I must respectfully disagree: your earlier comment was hardly polite, even if the word "antediluvian" could be literally true of attitudes as old as history.
A lot of old attitudes are changing (nothing new there), and a good thing too, but your own position comes over as "this is how it's going to be, and anyone who disagrees had better get used to it." Gender issues are sensitive matters, and much tact will be needed in dealing with them.