First-order logic: if (A AND ~B -> ~C) AND C, then (~A OR B).
The persistence of the gender gap in technology despite decades of effort to "fix" it is an annoying refutation of the blank-slate theory of human nature on which the entire worldview of many people, particularly gender activists, rests. In other words, if it's simultaneously true that tech is gender-imbalanced and that there is no systemic discrimination involved in this gap, then groups of human being might have innate differences, and acceptance of this fact has far-reaching and upsetting consequences.
Therefore, there must be no gender gap or there must be systemic discrimination. Since the existence of the gender gap is obvious, there must be systemic discrimination, and the pundit class has been on the warpath trying to uphold this narrative and cherry-pick evidence supporting it.