The nuclear family wasn't a choice, it was pushed on us by the economic elites who wanted to refine the old extended families (and, left unsaid, the old ethnic neighborhoods and towns) down into a more homogeneous group of consumers, with less overall political power. Catholic power, in particular, was of deep concern[1].
This has been further refined down to hyper-individualism, ideally childless, to maximize labor supply and flexibility.
The elites want relatively powerless, bickering identity groups composed of random individuals, that will not demonstrate solidarity with one another, and that will fall into line on elite issues (banking, war, etc.). One must say that they are doing a very good job of getting it.
This article is typical, well done elite propaganda, as one would expect from The Atlantic: it points out a real problem and then presents an even worse solution that appeals to our modern sensibilities, but that in fact furthers the elite goals.
[1] - https://en.wikipedia.org/wiki/American_Freedom_and_Catholic_...