No it doesn't have to be the traditional male/female, two parents, it could be homosexuals or grandparents, etc.
But for the sake of economy, two parents make more sense.
A single parent can do it, it's just less time for everything, because instead of splitting the jobs, it's all on one person.
I don't think this should be viewed as a positive, but I also don't believe single parents, who were in bad situations should be judged harshly or at all.
Another factor here, is that some choose it as a lifestyle choice, rather than they had bad situations.
That to me, should not be encouraged.
Single parent homes are one of the largest drivers of income inequality, besides preferential mating.
My parents should of never got together.
Their marriage was nothing but deceit, anger and resentment, which spilled over to my sister and I.
Being a 12/13/14/15 year old, counseling your mother, well it stinks and it's depressing.