They then is used because it can accurately and quickly show that someone’s gender is either unknown or doesn’t identify with male or female genders. It’s a matter of what the English language can easily represent and what people already understand. It’s why gay sex and homosexuality are called what they are as opposed to ÿefferîaß and ÿefferîaßiality. As opposed to in other languages I don’t speak them so I can’t really speak on it but it seems like there are commonly used terms to represent the concepts such as latinx, although seeing the reception Latinx receives I think it shows that they really should come from the communities that speak the language natively and need to represent it within their communities as opposed to something being propagated by Americans primarily speaking English.

As for “it’s made up nonsense” yeah I agree that’s an incredibly weak argument. However each non-binary person using their own version of they then pronouns with no actual distinction between what separates them. If someone provides a gender that they identify with that actually requires distinction because it’s unique traits separate it from other terms then it would have my full support but a problem arises when each person wants to use some new not previously existing pronoun to represent that they don’t identify as male or female. Along with that from what I’ve seen of neo-pronouns they usually enroll non-gender based characteristics into it. The tweet that this was in response to was from someone who included that claimed they arrived upon their gender due to being disabled which I think we would all agree doesn’t change someone’s gender. You wouldn’t look at a paraplegic man who identifies with the male gender and say “you aren’t a man you can’t be a man men can walk”.

Male and Female have somewhat well defined concepts of what they represent and as such are still commonly used among people who can agree that there are more than 2 genders, the problem arises when we allow a bunch of genders that represent nothing new, all sharing the same definition as “not male and not female”. Or it’s why in the LGBT community gender fluid gets its own distinction as a non-binary gender separate from the umbrella term. It represents a concept not already well defined, that a lot of people who just throw up random neopronouns in their bio fail to achieve. Well I’m open to recognizing more non-binary genders and associating new pronouns with them I think multiple people who just identify as non-binary all wanting their own unique pronouns hurts discourse and gives people who don’t want to see us achieve happiness talking points against us.