Yeshu: Sorry, but by your logic ANY female character is only female to get lonely male nerds attention.
Also you come to allot of conclusions without any actual evidence. It's borderline conspiration theory territory.
The plot is simple, but it is not meant to be complex or confusing. You learn about an old mans dream and go on a journey to make that dream come true.
Again, it's not a game for everybody and you don't have to make up some bs theory's about the developers trying to draw in horny gamers with a female character to justify you not liking it.
It's not in your taste, that's it.
Kamamura: You have missed one important distinction - and that is whether the developer uses it consciously to gain an advantage or not. I don't think you will argue about Lara Croft - here, it's obvious. I would say that games like Longest Journey, Syberia, Tunguska, So Blonde, and similar stuff are also a bit obvious.
On the other hand, consider games like Silent Hill 3. The main protagonist is a girl called Heather, but the game does not depend on her feminine charm to carry on the plot.
I'm not going to try and convince you but I beg to differ. As Freud once said "Sometimes a cigar is just a cigar." And I would argue in Syberia and Longest Journey it's simply a matter of the protagonist being a woman. I played both games and both are in my top 10 Adventure games of all time. Both games dealt the protagonist not using her feminine wiles, but just her intelligence (or rather our intelligence). Syberia is a great game worthy of its regular price.