Control

One of the standout characters of the show (and this says something, given the quality of the first Luke Cage season), Misty Knight explains why she turned out to be a police officer. Just like Cottonmouth, she was marked for life by an event from her teenage years. However, unlike the villain of the show, she decided to channel everything into combating the very thing that changed her.
Until this point, Misty Knight was a perfect detective. However, her first encounter with Diamondback revealed to her that she doesn’t have control over anything. Just like back in the day, when she decided to become a police officer.
The fact that she lashes out at Claire showcases her frustration. The dialogue with the shrink reveals to her that she needs to be in control. And the whole scene is yet another example of how brilliantly these characters are built.
An event can change a life, for better or for worse. In the case of Misty Knight, it was for the better.
