That wasn't said. There are certainly good and bad developers no matter what gender. If you have stricter hiring policies for men and e.g. only the top 10% of

That wasn't said. There are certainly good and bad developers no matter what gender. If you have stricter hiring policies for men and e.g. only the top 10% of male candidates land a job while the less strict hiring procedures for females get the top 40% females a job, then you created an imbalance in skills between the genders in your company (and only there), and this is what might have happened here