Lol, then I guess your answer is "[f]or reasons yet unclear, female Miqo'te are as numerous as males, a common trait among Eorzea's races."

Seriously though... Your answer is that that quote is a meta joke. It's both a reference to the fact that players could only play female Miqo'te for quite awhile, and to the fact that there are many many more players rocking female Miqo'te than male ones.
It's in reference to player built demographics, not anything tied to game lore.