"You must start thinking along the lines that you and your teacher are only one avenue of thought."
My teacher is not a singular person, but a collection of consultants who are counted amongst the leading ballroom authorities in the world today. Needless to say they don't all agree in every detail, but in working with them and discussing these same issues with them, a number of universal ideas become apparent.
"Advice should only be given from a technique book"
Impractical. The book is far from complete in terms of describing full fledged dancing. And more importantly, many of the issues-and thus debates arrise from inability to understand what it is saying. It's not the most clearly written thing I've ever encountered, and won't really make sense without a lot of background exposure to the traditions which it describes. There's even a lot of evidence that later editors have made things worse, changing details when they didn't understand why the originals were the way they were.
"or watching videos on this site"
Which are a great starting point for discussion, but not fully representative of actual championship practice.
The ultimate recommendation though would be simple: if you don't believe what you are reading, seek out your own lessons with the champions and those who train them, and form your own ideas of what it is they teach.