A man cannot become a woman and vice versa...that doesn't mean that men are better than women, more capable than women, etc...the only area where men have an inherent advantage is physical exertion, and even then, there are many women who are stronger than the average man, and many men who are weaker than the average women. Humans are sexually dimorphic.
But in terms of being a monarch, a politician, a writer, a scientist, a philosopher, etc...men are not inherently better suited to those roles than women are, or vice versa.