While we can entertain the idea that some people shouldn't breed(genetic defects that lower the quality of life for the individual or society) or shouldn't raise children(stupid raises stupid), there's no neutral authority that can make and enforce judgments. Even if we make an AI to do it, it would just reflect the view points of the people who made the AI or the sample set that was fed to the AI.

The best we can do is make a society strong enough to cope with these issues, either new and better genetic treatments or more robust public schools systems.

There's plenty of examples across different societies in the 20th century alone that practiced one form of eugenics or another that we now find appalling. Here's an article describing some from the late 20th century US.