Just because it's published in a book doesn't mean it's right.
Even if your teacher is the most intelligent person you've ever met,
and completely backs up that book doesn't mean their right.
I've been through college (it was art, not music but they follow the same arguments),
I had a few text books that seemed to make perfect sense at the time and some of the teachers were brilliant.
Now that I'm out of college and reflected back on my education, I realize just how wrong they were.
I don't respect them any less or regard them as any less brilliant,
but forming your own opinions is part of growing up.
Even if your teacher is the most intelligent person you've ever met,
and completely backs up that book doesn't mean their right.
I've been through college (it was art, not music but they follow the same arguments),
I had a few text books that seemed to make perfect sense at the time and some of the teachers were brilliant.
Now that I'm out of college and reflected back on my education, I realize just how wrong they were.
I don't respect them any less or regard them as any less brilliant,
but forming your own opinions is part of growing up.