language or thought leading to language may originate in academia but even when it does it wouldn't stick irl if there was not an organic need for it
something I should be expand on here
it's obvious from the most cursory examination of history that the reality of gender has never fit neatly into "man" and "woman"
in some cultures this was recognized - for example, the various conceptions of "two-spirit" (the modern catch-all term) among various Native American peoples, or hijras in South Asia. that's not say these all correspond exactly to modern conceptions of transgender, non-binary etc, just that they were, and are, acknowledgments of gender outside of just cisgendered man and woman.
in some cultures it was not. regardless, such people exist and have existed in all human cultures, whether there were terms for them or not.
and without terms people are written out of history, or rather they can't be written into it
so maybe you can argue over which specific terms and how they're used, but this idea of an imposition of something artificial is totally ridiculous
it is instead an extremely belated but still welcome acknowledgment of a reality of human existence that has always been, will always be