Yes, agreed - in general terms. But the plot element in question is (spoiler!) 'evil NPC A is disguised as friendly NPC B', and they've not done that by having miniatures of both A and B in the set, which would have been perfectly fine and actually useful if you were running the game. They've done it by having a miniature in the set called 'A disguised as B' which depicts A with their magical disguise only half in place, and not including a regular miniature of B at all. So yes, I think I stand by the 'gratuitous' here.