It's not surprising that many women steer away from STEM degrees or STEM careers. Or that many women who start STEM degrees drop out. Or that numbers for career women in technology industry are dismal. A good start in addressing the invisible STEM women might be to reject the explanation of lacking confidence.
The more fully we live and love, the more sadness we are bound to experience. Our inner critic tries to shield us from feeling the joys and pains of existence. It keeps us in a chronic state of numbness or dissatisfaction. In order to face our fears, we must consciously identify and actively ignore this coaching.