I think it is, to an extent. I grew up in a single parent house hold until I was out on my own (then my mother remarried). We moved around a LOT, like once or twice a year
I am married but don't have kids, but do have plenty of animals.
Not sure why it's like that, but maybe the nuclear family is just a myth? There are many types of families nowadays, and they all seem to work one way or another