Earlier quoted context omitted.
In my opinion the job of the Unicode Consortium would have been to encode what has significant and organic usage. Similarly to how Wikipedia only includes what has significant organic and externally validated coverage. If they'd stuck to that mission the line would have been a lot less fuzzy.
The problem with that is, of course, that "significant" is subjective. The modern Western society is very occupied with the questions of racial and gender identity, and it is generally accepted in that society that this topic is "significant". And since it's that society that the Unicode Consortium is working within, this explains how you get six different colors of "man-pregnant" emoji in the world where there possi…
I would like to stress that I am not arguing against the addition U+1FAC3 PREGNANT MAN or U+1FAC4 PREGNANT PERSON, there are good reasons to add these, but do we need mundane arbitrary everyday items line U+1FAA9 MIRROR BALL? I'd say no.