Several reasons come to mind, but there may be others beyond my ken. First, accepting a diverse populace is an easy ideal to espouse, but difficult to embrace. From the instituting of compulsory public school education and the legal monopoly of mainstream medicine, which began early in our country's history, mothers have been forced to give their previously held areas of expertise and rights over to government control. The official justification was the protection of children from abuse and neglect, but the outcome has been contrary. Literacy was higher before compulsory public school was instituted.
Schools are now places of terror for countless children.
The suffragettes and abolitionists, who comprise the pantheon of the first women's movement, put quality motherhood at the center of the ideal of a good and just society. Their activism highlighted EME's values. They led a matriarchal rebellion. Unfortunately, the vast majority of recent feminists have exemplified the anti-mother focus of deeply misogynistic institutions. They have accelerated the image of women as irrelevant in their female differentness, as admirable only when they achieve the male model of a mobile, well-trained servant of ambitious government and greedy business.