Men are expendable; women and children are not. A tribe or a nation can lose a high percentage of its men and still pick up the pieces and go on ... as long as the women and children are saved.
A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear arms, shall not be infringed. - Second Amendment to the Constitution An armed society is a polite society.
Delusions are often functional. A mother's opinions about her children's beauty, intelligence, goodness, et cetera ad nauseam, keep her from drowning them at birth.