i would be very careful about arguing from the general to the particular, which can lead to ridiculous remarks like:
Men (generally) specialize in spacial intelligence and mathematics, and we all know how much that predominates chess. Women, on the other hand, tend to have a higher propensity toward linguistic and emotional intelligence, and there's not much of that at all in chess.
a recent study showed that around 80% of men and 40% of women have "spatial intelligence" to a high degree, which would argue that if elguero's proposition were valid, and this was a critical skill, that about 1/3 of chessplayers would be women.
this is not so, which argues that this is not the reason for lower representation of women.
we argue that it is hard to compete against men because it is frowned upon by enough men to make us feel unwelcome, and many more that just don't care, whose idea of "open access" is by guys' rules and assumptions.
and finally, these spurious arguments are proof in themselves: if you replace "women" with "blacks" in your mind, and re-read this thread, and try for a little insight to replace the macho BS, maybe you just might be shocked.
Depends on who you are asking. Anyone who sponsers matches has a reason to promote women in chess: it would increase the audience if nothing else. More importantly, it is good for chess to try to include women. If it really is the case that women are equally able and don't play because of social reasons (which seems most likely), then the world is presumably missing out on many a qualified master, due to sociological norms.