> There are few if any true differences in mental abilities.
Science disagrees with you there:
• https://stanmed.stanford.edu/how-mens-and-womens-brains-are-...
• https://pmc.ncbi.nlm.nih.gov/articles/PMC6418873/
Navigation is just one such major mental difference, where women are far more effective with waypoints and landmarks in familiar spaces, whereas men are better at dead reckoning over unfamiliar land.
But I’m NOT talking about mental differences, but physical ones:
• grip strength,
• overall strength,
• height,
• gait,
• physiological responses to stressors,
• ability to better survive physical (unarmed) combat,
• some forms of physical endurance (each sex has its own specialty),
• reaction time,
• lactation,
• childbirth,
• and many more
All of which confer a distinct advantage to one sex over the other.
For example, the reason why we have the trope of the pickle jar being opened effortlessly by the man and the woman being entirely unable to open it, comes down entirely to gender differences to how collagen exists in the palms of the hand. Women have collagen running in just one direction, which allows extreme forces to begin tearing the skin and causing pain at much lower levels of force applied. Meanwhile, men have cross-linked collagen which allows extreme forces them to impart far more force on something in their grip before experiencing tearing and pain.
Strength is another male feature which completely blows women out of the water: almost all men are stronger than almost all women. It’s why female Olympic athletes can and frequently are trounced by teenage male athletes.
And of course, there is the big doozy: it is impossible for a genetic and physical male to become pregnant and give birth. And while a tiny handful of men have been able to lactate with sufficient stimulation, it is still exceptionally rare to achieve and may rely on non-typical (for a man) hormonal balances to achieve.
So physical differences can and do lend themselves very logically and rationally to a limited range of separation of concerns.