This whole post is just giving excuses for bad writing. Even though some subjects can be very difficult, a knowledgeable person, who knows how to teach and how

This whole post is just giving excuses for bad writing. Even though some subjects can be very difficult, a knowledgeable person, who knows how to teach and how to write can produce something useful. Personally, I tend to keep trying different books until I find something that makes sense to me. But I admit this is not always possible with more esoteric subjects. A good text book, like a good teacher, makes a big difference.