Hip-hop attracts some and not others. Every type of music has things people like and dislike. The very thing you don't like about hip-hop, someone else may absolutely love. Music, food, clothes, television, books, cars, etc. Different strokes for different folks.
Art is pure opinion.
For some, the process of pregnancy, birthing, nursing, etc. is seen as a wondrous miracle, nurturing and rewarding, fulfilling a primordial creative urge, a natural affirmation of one aspect of womanhood. For others it is a type of immortality - a continuation of a family bloodline or gene pool. Men could have many wives and concubines, but women were expected to be monogamous to assure indisputable paternity. Having children of their own may also represent a visible bond between two people who love each other - a part of a dearly loved person that will live on after the loved one is gone. To see their grandparents' eyes in their grandchild's face is to reaffirm their place in the continuation of life.