Re: Hey, I'm a card-carrying member of the "Over-thinkers Club," too, so hey.
:D I'm still trying to work out all the kinks with the languages--I'm leaning towards a mix of the two theories--there was a massive expansion by the Wutai way back when, but eventually empires fall. And even if it was past, it would have left enough of a bad taste that people wouldn't question the need to go to war with Wutai--they were the invaders at one point, and it'd be easier to paint them as a threat.
And oh, god, the poor person in the lab who had to, um, determine for sure if Moon was male or neuter. They had to be hating their life for a while.
...and you know, if you use the theory that spells without materia have to be spoken, something like that would explain why the scientists would have intentionally destroyed Moon's ability to speak.