Your article misses a key word: White.
White supremacy requires more white babies, and I will ask: How many Black women do you see in these propaganda pieces? I've seen a few and can't think of any. They're always white, blonde, Aryan types.
It's not even that much of a hidden agenda. It's also why they don't want people to be gay or trans. White people, anyway.
They can see themselves becoming even more of a minority than they already are (globally, the "average" human is still, I believe, a Chinese woman), and they are afraid of being treated the way they treated others.
It's about the economy. But it's also about...