Explanations and diagnosis
Why reading explanations is not enough.
Reading an explanation can help you understand why an answer is correct. But it does not automatically show why you missed it.
Two candidates may get the same question wrong for different reasons. One may not know the content. Another may know the content but misread the stem, fall for a distractor, rush the reasoning, or fail to apply the concept to the case.
The explanation tells you why the answer is correct. Mistake review asks why your answer went wrong.