This issue is my pet peeve.
It's the soft bigotry of low expectations. Women can not be held accountable for anything. Get knocked up by a bum--or is more often the case--several different bums. Bring kids into chaos. Never even consider the lives you are bringing into chaos? 100% THE BUMS FAULT.
And you and I should open our wallets to her because she's a "single mom". It's for the children. The one's she never gave a thought to when she chose the sperm donor to begin with.
She chooses the sperm donor, and, all too often, chooses the children's rapist or murderer as well.
If the circumstances of children who live with single fathers approached, even remotely, the frequency of poverty, neglect, abuse, and murders that occur with children of "single moms", father custody would be so rare as to be almost illegal.
Oh, wait...