There needs to be a mandatory parenting training course if you're expecting a child.

I like this in theory. But I know in practice some idiots will always manage to get their hands on the curriculum.

I agree with sentiment, but as stated that's just eugenics with extra steps. By controlling the cost, availability and/or accessibility of the course, you control who can have children. Also how are you going to enforce this policy, forced abortions?

Better imo to make childrearing a part of the school curriculum with a highly encouraged refresher course later on. That achieves the same end without risking peoples liberties.

I sometimes tell my kids about things I was taught, and survival habits I picked up in the "dad qualification program". I based the idea of the program on a brief description of air force officer survival training in the book The Hatchet, and a generous dose of imagination. The kids have never questioned it.