the issue isn't to degrade women to mere machines (as it's translated to the english), but to put in pragmatic terms the budding feminism that's occuring in japan. women are becoming more and more socially conscious about what kinds of roles they can play in society, and it's highly desirable for women now to postpone raising a family in order to pursue a university education, as well as securing a high-level career, among other possibilities.
in america (and many parts of the world), young women can pursue higher education and careers while still carrying the idea of "one day having a family". but (and this is an overstatement) it seems that in japan, "having a child" is a nuisance towards education and career.
i think abe's point is not to degrade women and say that they're mere machines, but to remind japan in general that women are the only human beings biologically capable of giving birth. giving life to a child is a wonderful thing. the time when a woman wants to have a child (if at all) is different from person to person, but it shouldn't be considered as being an outright nuisance. it's a natural part of humanity, and it needs to be understood on those terms.