Wikipedia has a stated goal of being unbiased. I think that most people would recognize that as being a worthwhile goal. When men write the majority of the articles, then the material is based towards male perspectives.
Many posters in this thread so far have made comments about how men and women are different, with different desires and goals and motivations hard-wired into their brains, so let's stick with that theory for now. If that is true, then men do indeed have a thought process that is markedly different from women's in some way, and that is therefore reflected in the articles - in the topic, in the construction, in the arguments, in the sources cited. There is bias. I guess, as men, maybe you don't care since the current content is written to suit you?
Every time this discussion comes up, no one acknowledges that women have unique and valuable mental contributions. There's a lot of hand-waving about 'Let's not force them to be in field XYZ if they don't want to be' but very little discussion of what the consequences of them not being in field XYZ are. Posters immediately think of how the solution cannot work and do not even acknowledge there IS a problem. It's the same issue here with Wikipedia.
It's a problem when the biggest fact-based document in history is virtually devoid of a female perspective. Just because you don't see a practical solution in the 10 seconds it took you to skim the summary doesn't mean this is not a problem worth trying to solve or that there is no solution. It's okay to talk about problems with no solution. You don't have to diminish them into non-problems.
It's often said that men find women frustrating because women want to discuss issues just to discuss them, whereas men want to solve them and find they cannot in some cases, particularly when it is emotional or involves other people. It's ironic that, in a way, this kind of pattern leads to the dismissal of 'unsolvable' gender-gaps, and yet the existence of this pattern is exactly what makes gender gaps worrying. Men and women DO think differently, and therefore there perspectives are unique valuable, and if one is lacking, they should be sought out.