Interesting observation. If I were to guess, I would say mastery of high performance machines means you must be willing to push them just past the safe limit to find what those limits are and teach yourself to recover when you go past them.
I would wager that an overwhelming majority of women are unwilling to do that. So they're very good at repetitive, textbook situations, but anything outside the envelope and they're lost.
Also despite TopGun and other movies, it is not sheer guts that matters, it is the mindset that deeply understand the machine and it’s envelope, and can execute procedures accurately and aggressively. Very few women function well under extreme stress, men do. Women function better in a methodical environment.
This is the reason men historically were CEOs and had a female secretary. Horses for courses.