https://singlemotherguide.com/single-mother-statistics/

One third (34.4%) of single mother families were “food insecure,”19 one seventh (13%) used food pantries,20 one third spent more than half their income on housing,21 which is generally considered the threshold for “severe housing cost burden.”

In Oregon, Massachusetts and New York, a single mother of an infant ages 0-3 would have to pay more than half of her income for day care at a center.27

http://motherhood.modernmom.com/data-single-parent-vs-dual-parent-households-15860.html

...increases the chances of their children not graduating from high school by 10 percent. Exposure to single parenthood as a child also raises the probability of next generation single parenthood by approximately 120 percent. McLanahan's research testifies that daughters of single parents are 30 to 53 percent more likely to marry as teenagers, 75 to 111 percent more likely to give birth while teenagers and are more likely to experience marital severance and have babies out of wedlock.

http://prospect.org/article/consequences-single-motherhood

Children who grow up with only one of their biological parents (nearly always the mother) are disadvantaged across a broad array of outcomes. As shown in figure 1, they are twice as likely to drop out of high school, 2.5 times as likely to become teen mothers, and 1.4 times as likely to be idle -- out of school and out of work -- as children who grow up with both parents. Children in one-parent families also have lower grade point averages, lower college aspirations, and poorer attendance records. As adults, they have higher rates of divorce. These patterns persist even after adjusting for differences in race, parents' education, number of siblings, and residential location.

It's not the worst thing, no. That's a bit of hyperbole. I was reading the other day about a dad that injected his infant son with HIV. That's one of the worst things, just like being born in Yugoslavia right around the breakup would generally lead to a worse outcome than being raised by a single mother in America.

But is it a good thing? Do we want more single mothers? No, we don't. In fact, the morally correct choice, disbarring an actively abusive husband, is to do whatever is within one's power to prevent a single parent household from becoming a reality.