When macbeth calls the witches midnight hags (line5) what does it suggest about witches and their activities

In Act IV, Scene 1 from Shakespeare's "Macbeth," the protagonist looks for the witches and insults the them by calling them hags - which is a manner of disparagement for a woman that means ugly, old witch. Nevertheless, he asks them what they are doing, and claims that they answer his questions, even though he does not know what actions they do to be able to see the future.

past mark brainest if can

i believe the answer is perspective