When I start seeing movements to increase the dearth of men in the fulfilling career of nursing, I might start having some actual respect for efforts such as these.
It's been happening for a while, you just aren't paying attention. For example: http://aamn.org/aamn.shtml
Some people get stuck in a single solution mentality. There may well be less inherent motivation to join programming in women. But every time the point is even close to being raised, Slashdot seems to have a collective hissy fit and shuts down and refuses to talk about it. Which itself is a sign that there's probably a problem, because we can't even talk rationally about whether there's a problem.
And frankly, if you don't see discrimination against women in IT, you are really not paying attention. I say this as a man in software development. When we ask if there's a systemic bias, it doesn't mean "are you, briancox2, personally a sexist radical who advocates giving women 1/4 pay and rescinding the vote from them". I think a lot of people take it as a personal insult.
Absolutely be welcoming and warm in our acceptance of anyone. Totally agreed. And when we see inequality, think critically about the possible causes. Are women not interested? Are women too stupid (most agree that no, that's not it, but strictly it's a possibility)? Are women pushed out of the field intentionally? Are women pushed out of the field unintentionally by social factors? Are women pushed out of the field unintentionally by physical factors (as a ridiculous example, if upper body strength were correlated to typing speed)? Is it because women have better alternative options that men don't have? Is it because men have safety nets that women don't have, and thus men can choose a higher-stress occupation? Is it a combination of factors?
Is it possible that some of these factors are actually pushing women into the field, but other factors are stronger? For instance, hypothetically it's possible that women are actually much better suited than men at programming but they won't do it because they have a fulfilling career in nursing that men can't break into. I don't think anybody actually believes that one; I chose it specifically so that we wouldn't get off-point by debating specifics. I don't really know the answer and nobody on Slashdot is really talking about it. They've landed mostly on "it's 100% from natural preferences" with a few on the "umm, obvious pervasive sexism???" and just a couple "actually everyone is discriminating against white straight middle class men".