I think it'd be more fair if you'd inserted an "in my view" before "at the end of the day he still sees children as manipulative, and in need of training, modifying, or controlling, along with the nasty Drs. Ferbers and Greens of this world". Please. Have you ever written a book? It's intended for an audience of more than one. And nowhere in the world does one size fit all. The author is surely subjective - he doesn't even pretend to be otherwise. That's what makes the book so real. And he does write in a very easy to read commonplace way. That's the essence of genius. To be able to tell in plain words what's complicated. Plenty of somewhat intelligent people can use complex words to explain complex phenomena. But only the real good ones can make it sound simple.
In my view, the author is tackling two complex things at the same time, and doing a pretty good job of it. The two complex things being, number one, a majority of parents with amateur skills and self-esteem issues on top, and number two, socializing kids into the world at large, and their cultural peer group in particular - which does, like it or not, mean limiting the full potential of human beings.