There's a great example in a TED talk about being wrong. To paraphrase, being wrong feels just the same as being right. What most think of as the bad feeling of being wrong is actually the feeling one has at finding out. Because being wrong feels just the same as being right, there's no gut-feel to look at the situation any differently. The loss of situational awareness can feel exactly like everything is under control and everything is perfectly understood.
If being wrong felt any different then no multiple-choice tests could be failed.