It started even earlier. Back when I taught about egoism in my ethics courses, I would point out that one of the anomalies in Ayn Rand's 1949 movie version of The Fountainhead is that there were couples, but no families and no children. Children require self-sacrifice, but as Rand herself wrote, “Self-sacrifice? But it is precisely the self that cannot and must not be sacrificed.”
Children require self-sacrifice, but as Rand herself wrote, “Self-sacrifice? But it is precisely the self that cannot and must not be sacrificed.” Children are just a long term investment in the future.
As I told my daughter: Children will be the most work and the greatest accomplishment in your life.
Children are expensive.
Doing without them is even more so, in terms of rewards from life.
We were meant to have and raise children.
You are correct about Ayn Rand. It is one of her great failings.
She, however, got many things right, and is a great author.