It's more than that, and I think you should know it. There are very simple issues like who one's spouse is, and most often in life, it's kinda hard to keep that a secret. Think Pete Buttigieg and his husband Chasten. Even when you are just seeing somebody, there are moments when a hug, a kiss, holding hands in public are perfectly natural -- and if you're straight nobody even notices, but if you're gay, too often there's a gasp from people around you.These arguments keep implying that I care. Or that I should care. But I don't. Unless you're my significant other, or a close friend, I don't care if you're gay or strait or bi or trans or by what ratio. Why would I? Why would anyone presume I would or should? I have no need to know. And I have plenty of my own issues to think about. If I see a stranger in a men's room wearing a dress all I'm going to think is "well that's interesting". And that's it. A few seconds later it's forgotten.
I think all these sexual and gender declarations are about something else. I think they are about people trying to be recognized in a world that increasingly ignores them. And I think the solution is that they need more personal real life friends. People around them that do recognize and appreciate them for who they are. Pestering strangers for that recognition is just going to annoy them. And understandably so.
As to washrooms, well, sometimes when you gotta go, you gotta go. I was at the opera a few months ago (Beethoven's Fidelio) and during intermission, while standing in front of the porcelain receptacle, a woman came out of one of the men's stalls. One guesses that the line to the ladies was just too long for her to wait (this is a problem in theatres of every kind) so she did what she had to. Even though I was standing there holding onto my manhood, I wasn't in the least phased by it.