The first approach aimed to suppress the birth rate of natural persons, which was not a planned parenthood strategy, but a more gentle method.
Want to have children? Sure, no problem at all, even with some policy support for individual childbearing.
However, raising a child always requires nurturing. The process of parenting is not just a private matter but a public affair of the whole society; one must have the necessary capabilities to do so, and being a parent is not easy.
Most of the spaceship's inhabitants were young people. Aside from a few kindergarten teachers, they lacked parenting experience and did not have the older generation's help. And caregiving robots were still in the experimental stage, not yet mass-produced, so it was impossible to allocate one to every family.
To reduce the emergence of unqualified parents, please take a test for a "Parent Certificate" first.