I think there should not be a fixed quota of how many women should be in the management, board and so on. The person who fits the best should be on the job.

The problem is, that in upper management jobs are dominated by men. And men have the tendencies to e.g. vote other men into a board, even if a woman would fit better.

There are lot of studies showing the positioning of a woman as a ceo helped enterprises to increase their revenue and decrease fluctuation and increase employee satisfaction in general, which is crucial nowadays imo. Holding on to your coworkers and keeping them happy is key for motivation and high quality products and services. Furthermore, women tend towards a more long-term orientation and less risky behavior, leading to a healthy and stable growth.