If I understand correctly, the idea here is that IQ is measurable (even if the measurement is noisy) and real (has predictive power, doesn't change). This is accomplished by studies that look to test individuals at different points in life. Secondly, IQ is mostly genetic. This is evidenced mostly by twin studies. Thirdly, math tests are okay IQ tests.
Note that I'm not saying that things are one way or another, or that the reason there are so few women in tech is genetic. Just explaining how the ideas go together. It COULD be that way.
But IQ is not that important when we're talking about being successful, making money, or building a good tech tool. Otherwise people with genius IQs would be the only ones ruling our society...but that's definitely not the case.
Some IQ advantage tends to help in these situations, but more isn't always better.
In other words, you're likely to do better if you're a little better than average (e.g. 1 SD or 115).
On the other hand, if you're one of those bizarro 180 IQ outliers who can't connect socially and emotionally (to say nothing of intellectually) with average people, you aren't likely to be able to be successful in a way that incorporates and leverages the contributions of other people.
Note that I'm not saying that things are one way or another, or that the reason there are so few women in tech is genetic. Just explaining how the ideas go together. It COULD be that way.