Yes, women use Bitcoin. Yes, they are sufficiently tech-savvy to do it. If you look at this thread, you will find that over 7% of users on this forum are female. It is irresponsible to denounce almost 50% of the world population in this way.
If there's a reason that fewer women frequent these forums than men, it is because of the hostile environment. BitcoinTalk is not Saudi Arabia. We are not to stereotype any gender, profession, race, or location. What is Bitcoin about? Decentralization. Money in the hands of the people—all people.
Sorry, but I think you are greatly exaggerating.
It is no secret that men and women often have different interests. I've talked to women about Bitcoin and their reaction was highly sexist towards me if we would apply your criteria.
I think the environment in these forums is certainly not hostile towards women. Any woman which interests herself in Bitcoin would be warmly embraced by the community...
ya.ya.yo