Despite the fact that the OP is about the banning, and the fact that I disagree with the banning facet, it is patently not the case that this is ALL people are discussing.
Nice strawman, but it's uninteresting as all strawmen are. They are only similar in that the old guard is totally fine with doing it while the new guard sees it as stupid to intentionally do it.
As far as reality, there is now a thread about a non-binary character in a video game, whereas 5 years ago that thought would seem crazy. So here we are. I'll let you figure out what is and isn't real given this.
I understand that you have this opinion, but it's just not true. In many cultures objects are gendered and yet they do not have biological sexes. Scientists also agree.
Mammalian sex determination is the unique process whereby a single organ, the bipotential gonad, undergoes a developmental switch that promotes its differentiation into either a testis or an ovary. Disruptions of this complex genetic process during human ...
www.ncbi.nlm.nih.gov
Some excerpts:
About gender identity vs gender role:
About gender identity vs biological sex:
This is from Nature, a top-tier scientific publication. I highly recommend reading it as it discusses some of the very physical reasons why gender might not align with biological sex, including various chemical-based reasons, or reasons when biological sex itself is mixed. E.g.:
In those cases, it's just assholeish when people on this forum or elsewhere insist on calling the person by the wrong pronoun on purpose, because THEY don't believe this and that. These people often have biological differences that are causing them problems, and all people have to do is say "they" instead of she or he or whatever to make their day just a bit better, but no. Somehow this is crazy because the forumites *know better* (read: are just personally uncomfortable with the idea of non-binary) about what these people are going through and the science behind why than, you know, the actual endocrinologists who are studying these things.