I did understand your post. That is why I worded mine that way. You do not want something additional to be an explanation, you want it all included. Therefore -> you must also hate it whenever someone brings in something that was not part of something said before (purposely held back or not is of no relevance here). So basically you must hate stuff like Ultimania Omegas which explain more about the world of Final Fantasy, as well as interviews that say something that was not in the game as well as must you hate sequels and prequels as well because they are also nothing but additional info for the world's stories. Both are a form of adding something, some of them already did exist during development just were not in there, some were created afterwards. So both versions are covered.
I could say more about Final Fantasy XV in particular but I can smell fan posts coming then - and I do not mean yours.