Haven't the time to watch the video as yet. But just a couple observations on this dynamic that has gripped the nation here these last few years.

As with many aspects of the identity movements, there is much militancy involved that appears to draw in quite a few vocal angry voices for the sole purpose of pushing the envelope against what many would find decent, daring a reaction to create a new battleground. As with most of the identity movements, setting out to create enemies and forcing change on others that treads on their personal sovereignty is sure to achieve the enemies and disgust you claim not to want.

I've noticed that in many cases such as this, (going along the thoughts above) there is a push to force us to not believe our eyes and instead believe an assertion contrary to what the eyes behold. You mention above:

However, because we do not TEST FOR THIS IT IS IMPOSSIBLE TO KNOW EXACTLY HOW "RARE" IT MIGHT BE.

That is a two edged sword, that could logically based on appearances, imply the eyes are correct the majority of the time.

All of this raises a few questions. At what point does the majorities of society end up telling the vocal militant minorities that they will not be accommodated at the expense of the many when it doesn't involve a real trespass against their person. I'm not understanding how my having to allow a biological female use the same restroom as me (and all the other men) is some victory other than some need to punish men for why I don't really get. I also know that no way if I had a young daughter would I want some biological male alone with her in some public restroom.

It seems that iffy science like this is being used to push extremes on the majority just to piss us off really.