NOLANtards are snobs
They love proclaiming that The Dark Knight, in being so “realistic”, is somehow the most true to the dark, psychologically intense world of Batman. They say this because:
(a) They want to convince themselves that Batman comics really are intended to be this realistic and intense and
(b) They want to convince others that what they read is so realistic and intense so that they can feel less embarrassment at still reading them in their 20s and 30s. The reason they overrate that movie so much is because so much personal validation is tied into that movie for them. So the more realistic the movies are, the more comic fans will claim to anyone who will listen that they just witness a movie that is exactly like the books they’ve been mocked for reading for decades.