Unfortunately, the world is dead. It can play around with cultural norms as if they are toys for whatever time it has left, but the diagnosis is terminal.
You don't have enough children, all of you, the fertility rate is below replacement and it is not a blip or a fluke. Children who grow up in your world are discouraged from even liking the idea of having children of their own some day. They grow up hearing all the same dumb jokes on sitcoms about how horrible it is to get married, to be pregnant, to raise children. The internalize it, and the next generation is smaller than the last. This isn't reversible.
> For most of human history, raising a family was not really a choice, culturally speaking
Only because if it was a choice, then you wouldn't be here to casually quip about "human history". A humanity that doesn't raise families has no future, there can be no one a thousand years from now to talk about past history.
Organisms that do not reproduce become extinct. It's been hardwired into our biology since day one. Talking about it as if it were some choice is bizarre and indicative of a lack of self-comprehension. Might as well talk about not having a choice in whether you breathe or eat.
The same people who talk about dangerous and virulent memes, the so-called "disinformation" are no more immune than those who wallow in the things.
> We’ve given up our stable optimum of centuries and clearly not yet found a new one.
Good news. You still have -30 years to find one.
