For them its a complete surprise when they end up as single mothers. They think its a racist stereotype about black men that they leave women as single mothers, and of course in their progressive small little minds, things such as statistics, data and stereotypes are a creation of a raycist white mang. There's about 77% likelihood of it happening to a black woman according to some stats. And even higher for women of other races.
Usually these (white) women are low IQ (just like black women) so they end up getting with a black guy. That's who they resonate with. Since these women are low IQ, they mesh up better with r-selection men. In many ways, it was biological determinism that they ended up as single mothers, as they find these low IQ r-strategist low inhib men attractive. It is what it is. Let them have their cake.