The reason is simple: segregation of lore and gameplay.
Lothering was a big village. However, the areas we visited was small with about 5 houses.
The same applies to female representation. Just because you don't see them, doesn't mean they don't exist.
Even so, I considered the "represented" to have a qualitative inference rather than a quantitative one. Women are allowed to join almost all orders, and are capable of assuming leadership.
Last time I checked, it seemed more women were in charge in DA2 than men.
Also, I hold the belief that people like you are trying too hard to homogenize men and women. Generally speaking, men and women are still different from a biological, and consequentially a psychological, standpoint. Women do not WANT to be men. You assume that everyone has your same beliefs. You're just as different from most women, as men are to each other. If you want to join the army, Thedas lets you. This doesnt mean women should do that. If women are more likely to be housewives in Thedas, there's no shame in that. It still doesn't mean that they aren't capable of leading armies if thy wished to.
Lastly, I am loathe to see someone use examples from Origins to prove their point. It s clear that writers often mess up and include disrespectful depictions (outright sexism etc..) in their games. They have even admitted it, and Bioware has improved upon this with every iteration.
Dragon age 2 also has quantitative representation. Leaders were both men and women. Generic pedestrians were both men and women. Enemy units were both men and women (barring Qunari). All in a mostly equal ratio.
This is very true about DA2, but the thing is, from the screen of Inquisition I posted and the concept art, it looks like Bioware may revert back to DA:O presentation.
Also, the only way this argument will ever be settled is if Bioware state whether it is qualitative or quantitative, otherwise we are just going to go around in circles 
Plus, are women mainly in power in DA2? I mean, there are about 50% females in charge or little gans IIRC, but in terms of big leadership roles we have:
Meredith
The revered mother (who has to be female anyway)
Compared to:
Arishok (who has to be male anyway)
Viscount
Orsino
Duke Prosper
And Alistair (as Anora does not appear if you chose her)
So it's true that in small organisations the presentation is about even, but not really in big ones.
Anyway, I'm done arguing about this because it has just got semantic. Until we know whether 'Evenly represented' means qualitatively or quantitatively, I don't think there's any use in continuing the debate.