I think I understand now what you mean but I would ask if this is simply nitpicking at this point cause most sidequest have little to do with the actual main game and most are very detached from the story in almost every RPG out there.

I feel considering the amount of information you get for many of the mark hunts in XII, saying they are detached from the game would also be implying the similar missions found in the FFT series suffer the same problem seeing as they have less development than the ones found in XII.