I would argue Richard, that since 70-80℅ of divorces are initiated by women and the fact that the most commonly cited reason for divorce is "dissatisfaction" vs divorce with cause... we can assume that formerly married women are single by choice.

You bring up male abandonment as a cause of women being single mothers... Do you have some statistics to back that up?  Your assertion is the first time I have run across that claim.  You realize that considerable state resources are spent making sure men can't do that.  While a women can legally surrender a child a man will be incarcerated for failing to make child support payments.

As for asserting that women should "step up" I was rubbing the original posters face, Robin H, in her own rhetorical nonsense.   The street name for that literary play can be summed up as 'sauce for the goose...'