Yeah they are, expecially for the average childrens in average single household (struggling single-mothers). The idea that being a single mother is heroic is dumb and a disservice for everybody, expecially the children involved. At best single-parents are Martyrs. Obviously there are the exceptions but data shows that single-parent households are extremily more likely to live in poverty or near poverty.
I believe that children in struggling (financially & other) households should be given in temporary adopotion into stable families (with a set of incentives or child support checks) till one of the original parent find enough stability to fully take care of them. "It takes a village to grow a kid 2.0" approach