I agree with Iljk that the Hold On To Your Kids book seems rather scary.
Also comes with a somewhat tenacious grip on history: they seem to imagine that every household before WW2 had a stay-at-home parent who engaged closely in the supervision of their teenagers and kept them safe from peer influence. Bollocks!
In the upper and upper middle classes, boys were sent to boarding school before they entered their teens and once there the closest influences would be older boys. As plenty of witnesses testify, there was virtually no supervision as to how those older boys engaged with their younger companions out of lessons: enforced sex was rife and extreme bullying common.
In the working classes, a child would often leave school at 12 or 13 and enter service, where they might be able to go home once a year. They would be completely at the mercy of older servants, masters and mistresses and, of course, "the young master".
The authors seem to believe that every family in Victorian and Edwardian England possessed a family farm large enough to support a whole family of adolescents. Downton Abbey, which is often slated for being rosy-tinted, is a whole lot more realistic about what life was actually like.
Now I am not saying that I want to go back to those days, but then again, very few people, unless completely dysfunctional are in any danger of that. Even children who board have a totally different experience these days. But I would like my own dc to have the chance to develop some of that self-reliance, just under safer circumstances.
And as a child of a very close-knit, very introspective and reclusive family, I am aware that my own extreme attachment to my parents and total belief in their ideas have not always helped me in adult life. In that sense, school did a good job of providing alternatives. Which is one reason why I did not feel safe to try HE myself: I could see myself as wielding too much influence. In a sense, I am too nice, I am (or at least appear) too well educated, I am too eloquent- they could have gone a long time before they discovered I don't have the keys to the universe.
But this is not to say that a different family could not HE perfectly well. After all, many of them do. Just that I probably shouldn't attempt it. Personality thing.