Treating your last point first, the video makes no pretensions about treating the whole personal identity.
Of course it does.It pretends that the concept of identity is the same as an objective fact, like height, or age. It's being deliberately dishonest in this way to make the interviewees look confused, and foolish. Very low-brow, but typical for "moralists".
The holistic man doesn't matter when it comes to bathrooms and showers - which are ALL about private activities and exposure that is done in public.
Privacy has nothing to do with gender or genitals. This is not a privacy issue, it's a gender issue. No one is arguing that public showers and toilets shouldn't be "private".
It is an entirely biological issue.
No, it's not. And your repeating this isn't going to change that. Biologically speaking, we can all use the same bathroom, showers, and locker rooms. Biology has nothing to do with any of this.
You yourself said "none of us should be seeing anyone else naked".
Yes, because we all prefer privacy in a shower, on a toilet, and in dressing rooms.
Aside from the fact that this is all but impossible in a public shower (certainly a locker room shower) and not out of the realm of possibility in a dressing room and/or restroom - there are only two ways to go.
Yep, it's time to change the way we design public showers and dressing rooms, to accommodate our new desire for privacy, and our multiple differences regarding gender. This isn't that difficult, as it just requires some extra screening.
This isn't about broccoli…
You were trying to make it about preferences, and you were complaining that some people say it's genetic while others say is choice. I was merely pointing out that it's all of these, and more, and that ultimately, it doesn't matter. Because we like what we like and we don't what we don't. And none of this is anyone else's business.
… this is about biology and clearly, objectively definable boundaries.
No, it's not. It's about gender identification and sexual preference. If it were only about biology, none of this would be an issue, because no one knows what genitals are in anyone else's pants in a public restroom. Yet this is where the whole issue began. And it's not because of anyone's genitals. It's because of gender-based fear and bias.
The rejection of those clear boundaries is why we are in the mess we are in.
Obviously, there the boundaries aren't so clear, or we wouldn't be having this discussion.
And the only legal justification for permitting (indeed, enforcing) that rejection is the feelings of those who have rejected plain objective truth.
We don't need legal clarifications about our personal identity. We only need to protect every citizen's right to identify themselves as they choose. Legally, public toilets need to be provided for everyone, where groups of people are expected to gather. And everyone must be given access to them. They must afford reasonable privacy, but they don't have to be divided by sex, gender, or any other designation. That's optional.
The scriptures say that the Ninevites didn't know their right hand from their left because their spiritual darkness was so advanced (Jonah 4:11). What the video displays is how close we are to seeing that literally fulfilled today. If you feel like that is your left hand, then...well, it must be.
This is not a religious issue. The scriptures have nothing to do with it.