Treat illness - not the symptom.
The aerospace and aviation industries are dominated at every level by men. It's hard to appoint women to the top jobs when there are few in the ranks to promote.
The problem is so much deeper; the current drive is only treating the symptom and not the illness.
So airlines, manufacturers and the military all need female pilots, engineers and managers coming in at the bottom to provide capable employees for those at the top to choose from.
Unfortunately, most girls are not interested in working in these industries for cultural reasons. Effecting cultural change is a long-term project and no amount of hand-wringing will solve the top-job gender disparity problem.
(Source: Flight International January 15, 2019)