No doubt, history is filled with all kinds of evil misogyny, racism, and homophobia...and large swaths of the planet still have those problems, especially in the islamic world. But we lose sight of the truth, that people are individual *actors*, not *objects*, all too often. Fighting the scourges of discrimination of various sorts doesn't lead to some predetermined statistical balance, it gives individual actors the *freedom* to make the choices they'd like. Sometimes, those free choices are lopsided, and that's *okay*.
The problem is not if a gender imbalance is inappropriate, but the question we should be asking is, is there any systematic problem?
There's a fine line between "they don't want to do it" versus "they're being actively excluded from doing it".
So the question is - in all fields, is there something we're doing that prevents women from entering the tech field, or editing Wikipedia?
It could be something as simple as "women can't stand the immaturity of tech people" (given all the trolls and all that). In which case, the reason we don't have more women is systematic - we're all a bunch of immature idiots who cannot behave. Now, whether or not we think it's a problem is another issue altogether, but knowing that, it's a lot clearer as to why.
If the answer is instead "women just don't like tech" then fine, the imbalance will remain because we can't change personal preferences. We can ask perhaps why they don't like tech and it could be stuff like "don't want to sit in front of a screen all day" which is something we cannot change, and must accept.
That's the real question we should be asking - WHY is there an imbalance, and is it something we can potentially fix. If it isn't, then fine, we shouldn't bother trying - but at least we know. If it can be fixed, then perhaps we should look at ways to fix it.
If it's because of something stupid like "tech people are immature" it's a real problem we need to fix for many reasons, including simple respect - if you don't act like you deserve respect, don't be surprised when people don't. (Why do you think video games get the stereotype of teenage boys, despite the average gamer being over 35? Act like teenagers, and people believe you are).