In 2013, Cambridge examiners explicitly pointed out that GP is not a test of general knowledge. Students who receive poor grades despite their extensive use of examples should note that no amount of facts and statistics can make up for a poorly-developed argument.
The General Paper subject is primarily about the arguments. Cambridge examiners have made that abundantly clear. Students must argue, reason and persuade, not flood the examiner with details and lengthy descriptions.
This is the trickiest part about GP. Memorising model essays will not work. Neither will copying and pasting canned arguments. Because every question is different, every response must be unique. Within those 90 minutes, students must formulate and express their own arguments.
It is therefore important for students to learn how to use examples to support their points. This is why we teach students to focus on convincing the examiner with persuasive arguments, substantiated with strong examples, rather than on impressing readers with their depth of knowledge.