Because women have been graduating from college in 30-plus percent greater numbers than men for years, there are now four women for every three men nationally in the marriage-age, college-educated dating market...IOW, single moms on public assistance find it easier to get a college education, and then don't want to marry anyone who wouldn't marry a Kardashian.
The biggest demotivator of women, besides marijuana use, is the birth of their first child. Work/career becomes less important.