You could phrase the question this way if @trianglem was suggesting to make some language more gendered. It totally makes sense to ask, why gender is special, i

You could phrase the question this way if @trianglem was suggesting to make some language more gendered. It totally makes sense to ask, why gender is special, in such situation. But what they did is different, they asked why do people want to make a language less gendered. Which is a completely valid question to people who advocate this. Some languages already do make distinction between genders, and this is a feature that makes gender special enough, unlike height or eye color. Making changes to a language requires effort and causes inconvenience, so it's up to advocates of making a language gender-neutral to provide a motivation which would be worth the effort. If there was a language which had different pronouns for people of different height or eye color and we wanted to change that, we would have to motivate this too. -- I personally think that it's convenient to have both neutral 3rd person pronouns, which can be applied to anyone, and pronouns that make distinction based on something (not necessarily gender) as well. Neutral pronouns are useful in cases, when you don't know enough to choose the right non-neutral pronoun. Non-neutral ones are good because they give you a convenient way to make distinction between things you talk about, as @theli0nheart already noted here. For example, in English you can introduce two people of different gender and then refer to them as "he" and "she" without having to repeat their (possibly long) names. In Turkish, where they have only one singular 3rd person pronoun "o", this won't work and you'll have to either name the people every time or use some other shortcuts. In Russian, for example, you can go even further than English — in this language even nouns, which do not denote people, have gender, so you can conveniently refer even to objects in your speech.