One circumstantial word: Japan. Demographic equality isn't necessary, but acceptance and encouragement so that they may envision themselves in those jobs as a viable option, else we take the lazy way out and import labor to meet demand.
But how is addressing a gender imbalance a solution to that problem. There are many ways to address a shortage of talent in an occupation besides moving people from one gender from one occupation to another, especially the naturally talented (nb: intelligent is a highly heritable trait). Furthermore that solution will likely just result in a talent shortage in the occupation you're moving people away from, requiring other solutions like bringing in talent from abroad.
