Men, on the whole, are physically larger and stronger than women. Yes, there are individual exceptions, more so in today's politically correct culture as White males degenerate into Dilbert-esque cubicle dwellers and women become more masculine in character, which seems to somewhat augment their physical size. We are becoming less than men in every sense of the word. But in all non-yuppie, more or less organic societies of all races, men are as a rule the larger and stronger. But most of these exceptions are individual, culture- specific, or otherwise idiosyncratic.
Men are physically bigger and stronger than women.
The woman bears and raises the children. It is innate. It is biological. It cannot be changed, and any attempt to tamper with it produces disaster and destruction, as we are now learning in Politically Correct America. No baby creatures are more helpless than human infants.