Ideally, it shouldn’t matter if we don’t have 50% women engineers.
But in the real world, when we don’t, we end up with cars that aren’t designed, wrt safety, to account for the physiological differences between men and women. We end up with AI experiments that have to be terminated because quite quickly they end up with robot voices talking about raping women. We end up with pharmaceuticals never tested on women and vast surprise when, after centuries of anatomical study, scientists finally deign to examine the clitoris and discover it extends into the vagina.
It starts SO young. There was a Guardian article some years back about a study that found that 6- year olds think “genius” is something only boys can have.
In my opinion, all the intensive research into discovering the holy grail — THE thing that makes male and female brains different, cognitively, serves to perpetuate that. We’d be aghast at anyone doing that research wrt race or ethnicity. But because we ALREADY accept the idea that there IS some important difference (one which, naturally, positions women on the wrong end of the value-spectrum) we dont blink an eye at spending billions to prove the case.