“As an example, he says, “who goes to Yale to become a social worker?””
We see that expressed here. I’m not going to pay my kid to go to a private BS or college, to not get into an Ivy or to be a teacher, etc…
Well, not all kids at BS are excellent sheep. Mine aren’t especially one of them. Wouldn’t study a lick for SATs, for example, because of zero interest in packaging oneself for college admissions. I can’t even imagine either one wanting to work in consulting or anything close to it. I wouldn’t be surprised if one or both follow an entrepreneurial route. I would describe them as authentic people but that doesn’t necessarily make it easy to guide them along the way. And I do sometimes worry about the real, practical implications as mentioned by @gardenstategal. 
Sounds to me that the people who might best benefit from reading the book might not even see themselves or their children in it, as they are so wrapped up being “excellent sheep” themselves.