This is patently absurd. For one thing, the nuclear family itself is not currently what the vast majority of the population wants; if you look at the global population, both now and historically, the extended family is dominant. I might as well argue that children abandoning their parents and home is an unnatural construct, that's replacing the 'tribal' way of living that was natural for humans for millennia. I could further argue that (since the nuclear family only became the most common type in the US in the 1960s and 70s), it was done in corporate interests to sell more cars and suburban houses, and that it is in fact YOU that is slobbering all over corporate cock.

But I wouldn't make that argument, because it's reductive and, frankly, a bit silly to let a narrative take the place of actually reading some sociological studies.