The actual title is "Why do we not have enough women programmers?". And I question the premise. The writer does not directly address this point, but an implicit

The actual title is "Why do we not have enough women programmers?". And I question the premise. The writer does not directly address this point, but an implicit premise is that if the proportion differs much from 50% we should look for something wrong. Well, that's somewhat reasonable so far - certainly there are cultural factors impeding what would occur in different conditions, and maybe causing societies to miss some talent and individuals to fail to realize their potential. But the goal should be only to attain whatever percentage naturally results when any undesirable interferences are removed, and that condition is so poorly defined that we can't say that near 50% would be the outcome. The correct approach, IMHO, is to attack any problems that are found in upbringing, education system and workplace culture - not with a goal of increasing representation of any group, but instead to remove any unfair treatment, sexism, loss of valuable contributions and so on - just because those things are undesirable - and then whatever results will be OK.