Meh, I think its very rare that a lone group of parents(single or together) are capable of raising a child well enough that they in turn, are not going to actively fuck up their own children in the future, when they raise them.

If you don't have your HA in someone consistently apart of life's ego block, during your developmental years, that's absolutely going to stunt confidence and marginalize the creative. An identity and Dual Parent is probably awesome, everything valued is encouraged and you get to learn identity tricks of the trade that will make sense as you get older, but that's 1/256. Everybody else is going to have a group of parents that marginalizes something, and thus that's what I think is the real nugget of gold behind the "it takes a family" quote.

There are things that kids need around them, and its unlikely 1 or 2 people can hit the full quota.