As Mr. Hume told us a few hundred years ago, nature simply is, and doesn't tell us what ought to be. As such I have trouble understanding why we are approaching the issue from this angle.
Instead of obsessing about biology, we should care about how we want our workplaces to look. And I would welcome a diverse workplace instead of male or female monoculture. We can shape how our society works, we're not slaves to nature.
I find this discussion funny in the context of say Israel having countless women serve in the army for decades now. Someone must have forgotten to tell them about their biological limitations. Having worked in China for a while, where as a result of the one child policy pretty much everybody is expected to start a fruitful career, women just worked and had children at the same time. Someone must have forgotten to tell them that this is impossible.