Control over sex and reproduction seems to me to be not a requirement for, but an unmistakeable sign of a totalitarian regime. Telling someone what drugs they can and cannot put in their own bodies seems bad enough to me; telling people what they can do with their bodies, with those they love, is several orders of magnitude worse. I think the notion could be dismissed on those grounds alone. Even if that were the only problem, that would still, in my eyes, be enough.
But, of course, that's far from the only problem. There's also problems like how you'd enforce it, who would be allowed and who wouldn't, how to sustain a population in the long term when many countries already have fertility rates lower than what's needed.
Besides, it's all based on the notion that certain upbringings will produce "bad" people, and others produce "good". I have no doubt that a child raised by a poor, uneducated single parent in a dangerous neighborhood will be more likely to end up being in some way "undersireable" to society, and vice versa, but there are no guarantees either way. You're not dealing with natural science where you can generalize and create tidy, organized theories.
And we've managed fine so far, with no indication that things are getting any worse. While it's of course possibly to point to specific examples, that can't be the basis for laws of that magnitude.