There are many reasons why women are less than half the workers in the tech sector. The problem with the "it's all sexism" argument is that women face sexism whenever they try to enter a male dominated workplace. Is the author suggesting that in the last century women entered medicine and law in much greater numbers than engineering because the crusty old make engineers were so much worse than the crusty old doctors and lawyers?

Let's end sexism, of course. But let's not measure our success by the occupational choices people make.