Gee, in a few sentences you negate the struggles and unbelievable work single parents endure when, very often through circumstances not instigated by themselves, they cope and deal with providing loving and nurturing homes.  One can be a single parent through widowhood, abandonment, and a hundred other situations -- and children can be strengthened and become more responsible and independent and spultimately successful because of those situations.  Single parenting has been extant in every culture since forever.  Thanks for your understanding and compassion.