If you were in the American slave-holding South in the days of slavery, and a supporter of slavery was demanding studies and ‘evidence’ to justify your argument for ending slavery, would that not strike you as a highly immoral stance?
We may subscribe to the values of rationality and taking children seriously, but when it comes to detail, we may well be mistaken about particular aspects of it. So instilling anything, including those ideas we most value, is a mistake. We want our ideas to be corrected. We want our children to be able to correct our errors, not be saddled with them.
We parents sometimes imagine that we can teach our children to be sensitive to others’s wishes by being utterly insensitive to theirs, but actions speak louder than words, and our children are more likely to be kind and thoughtful if we have been kind and thoughtful to them.