Amen to that. Not only is teaching a craft, I think it's a passion.
I took College Physics I with such teacher. Physics I was one of the toughest courses in my college. According to the student polls, 70% voted it as THE toughest course. Anyway, this professor was different (there're other professors teaching the same course). He didn't mind going unconventional way. For example, he claimed that he was the only person in the country who teaches force first then motion later rather than the other way around. (In fact, he refuses to teach the other way around.) The great thing about him was he provokes students' curiosity and appreciation to the subject. During the first day lecture, he concluded it with an experiment he claimed to be the greatest experiment ever performed on earth. He just threw a chalk up into the air and caught it back, and that was it. Then he asked why didn't the chalk "fall behind" for the earth was spinning and moving at many kilometers per second. He not only knows his stuff, he has a passion to teach, cares the students learn. In many ways he has a hacker attitude. I admit there'were students who hated him because he was tough on grades, and he didn't mind shushing those students who just took up most of the time with a lot of irrelevant, stupid questions. (He'd be patient at first, though.)
Back to the topic, I think unschooling might as well work for many people, but at the risk of not meeting such great teachers.
In the 1800s they used to enlist prisoners to teach the newly-minted public schools, as their community service. These people had absolutely no qualifications to teach; however, the children produced from these schools were more equipped for the world of the time than any child today. (This is something from Gatto, so I have no idea if it's true, but it's a good argument if it is.)
Also, "postscript", something which comes after the main statement. That it changes the basis of the statement itself, could be called a linguistic hack.
The problem in this country is well known. We have too many poorly trained and poorly paid teachers. And unfortunately with No Child Left Behind, we've stiffled the good teachers as well.
You can't just remove the teacher. Even the author's experience of independent study still relies on teachers to create the curriculum, produce learning materials and monitor progress through tests. That's a far cry to "go learn on your own."