Bear with me, long and rambling.
When society has changed in the past, most recently on gay marriage I think, most people knew it was going on and it was broadly supported, although I'm sure there were a sizeable majority that opposed it for various reasons.
This trans stuff and the concept of gender fluidity isn't even on most people's radar. The vast majority of people believe (as do I) that you're male or female. Most believe men can wear dresses and boys can play with dolls and that girls can climb trees and get muddy. But that on the whole boys are boys and girla are girls. So where is this huge wave of trans issues and trans policies and changes coming from? And why does no one actually seem to notice or comment?