I don't understand how
not demonstratin ur knowledge of the texts
Could be seen as anything other than false advice to get everyone bad marks. That's complete crap. What else are we doing BUT showing our knowledge of the texts? That's the whole purpose of the thing.
Seriously, how on earth can you only use your texts to 'back up' an argument? Are you supposed to ramble on for page after page with an 'argument' and only make fleeting references to the texts to support it?
No. The argument must follow logically from what is IN the texts.
Her model:
A: I believe that journeys are ... (whatever the question asks)
B: Therefore, this argument is supported by (set text)
My model:
A: In (set text), (composer) uses (technique) to (produce effect) in the context of a journey.
B: Therefore journeys are (whatever the question asks).
What you are saying is illogical, and misleading. We are meant to demonstrate a sound knowledge of our texts to the marker. The 'argument' side is just embellishment; an 'angle' from which we discuss the texts.
This is NOT a university thesis, or a court case, and people should stop thinking of it as such.