sigh

That's the rub. I repeat my claim: the culture you want is, on net or overall, closer to our society than to societies that are OK with infanticide. It's evidence against your extrapolated-volition utopia being OK with infanticide. (unless I have absolutely zero understanding of Bayes)

Look two comments up.

It is certainly weak evidence in favour of a practice being nasty that societies which practice it are generally nasty in other ways. But it is just that, weak evidence.