...because God clearly intends for a married couple to reproduce annually as long as the woman's body can do so, from marriage age (18?) until menopause or death, whichever blissfully comes first.  Never mind the stresses on the family, finances, children's shaky future, culture, the environment...and heaven forbid that the Guv ever provide any material assistance at all, given those strong bootstraps every family member is born with.  It's so much more spiritual and righteous to ignore one's God-given intelligence, critical thinking abilities and conscience and choose instead blindness obedience to imagined laws from God and His holy, never-wrong, always absolute institution, which is controlled by celibates with no personal history of ever having to provide either love or support for their own wife and children.