In contrast, you can treat "We should make sure women remain barefoot and pregnant" as a claim in need of evidence, and in this case we can establish it as false. Most obviously because the proposed situation would not be very good for women

That's just looking at one of the direct consequences, accepting for the sake of argument that most women would prefer not to be "barefoot and pregnant". The problem is that, for these kinds of major social changes, the direct effects tend to be dominated by indirect effects and your argument makes no attempt to analyze the indirect effects.