"Use gender-neutral language" is motivated by an egalitarian instinct, and is said by (moral) authorities - both are things libertarians don't seem very fond of.
(I don't identify very strongly as a libertarian, but can relate to the kneejerk reflex against being told what to do)
Also, some people might not phrase it as "people started realizing why that was a bad idea" but rather as "sanctimonious politically correct busybodies started telling everybody how to speak resulting in some horrible eyesores like he/she or ey all over the place". I don't really buy the second version , but I don't think the first one is a fair description either (though it's hard to judge from a French point of view, gender and grammar work a bit differently in French).
Politics is the mind-killer; but rationality is the science of /winning/, even when dealing with political issues.
I've been trying to apply LessWrong and Bayesian methods to the premises and favored issues of a particular political group. (Their most basic premise is roughly equivalent to declaring that Iterated Prisoner's Dilemma programs should be 'nice'.) But, given how quickly my previous thread trying to explore this issue was downvoted into disappearing, and many of the comments I've received on similar threads, I may have a rather large blind spot preventing me from being able /to/ properly apply LW methods in this area.
So I'll try a different approach - instead of giving it a go myself again, I'll simply ask, what do /you/ think a good LW post about liberty, freedom, and fundamental human rights would look like?