

Yeah, that’s kind of the advantage and disadvantage of Markdown. It’s so simple that alternative implementations can be easily created, which helps with adoption. But because those alternative implementations exist and because there is a need to add more features, those alternative implementations will see custom changes for the format, ultimately making the format less standardized.
Those are classifications made by humans. Nature doesn’t have a concept for sexes and even less so for syndromes. If it became evolutionarily advantageous to have a dick and a vagina, nature would be onto that.