You're assuming fertility rates wont rebound once there is less population pressure.
It doesn't even take loosening population pressure. 1.6 birth rate in some country is only an average; some are still having 3+. If children start taking after their parents again, 1.6 birth rate now could mean 2.1 next generation and 2.9 after.
alt Hacker News
It doesn't even take loosening population pressure. 1.6 birth rate in some country is only an average; some are still having 3+. If children start taking after their parents again, 1.6 birth rate now could mean 2.1 next generation and 2.9 after.