CEO positions tend to be filled by the most highly competitive personality types. People willing to sacrifice most of their life to attain a single goal.
Perhaps women tend to choose to lead more balanced lives because they find it more rewarding and meaningful.
Humans are incredibly varied and I don't doubt there are highly dedicated, passionate women sacrificing most of their life to attain singular goals. That's why there are enough women to have an entire women's league of most professional sports. If it were true that women tend to choose to lead more balanced lives to the point where entire leadership positions are almost completely bereft of women, there would be no female professional athletes, and certainly not enough to have leagues and teams of them. There would be no female dancers, and especially no female ballerinas.
/s