What does the rabbi think about eugenics – who has the right to give birth?

For a drug addict who brings her child into a world of addiction, poverty, and suffering – is she allowed to bring a child into the world?
And of course there are endless similar examples.
The practical application is quite risky, but the theoretical question is important. What’s more, it’s already happening in the abortion committee.
 
As I understand it, the reason for the ban is mainly to prevent the child from suffering.
The price of prohibition is suffering for the parents who long for a child. But their blood is no longer red. There are also additional consequences, for society as a whole.