Well first of all, children who lie need to be held accountable. At all times. I suspect JA began lying at a young age, and was never held accountable for any misdeed, lie or other bad behaviour when young.
Also, JA's problems are more extensive than pathological lying. We've heard one psychologist testify that she believes JA to be a borderline personality. Lying is just one of the "symptoms" of that diagnosis.
I have seen zero evidence of the parents intervening when JA began acting out (kicking dog, hitting mother, lying, skipping school, etc.) as a child. Other than the parents calling the police when they found weed being grown on the roof of the house by JA as a teenager. By that time it was far too late. Her parents should have sought 3rd party intervention when she was a child IMO.
Yes, JA is selfish. Yes, JA is all me, me, me. IMO that selfishness was enabled by her parents and other adults around her when she was growing up. They are responsible. Society isn't. Society has paid a very high price for it.
I have zero, ZERO, sympathy for her parents and other family. They and they alone raised the monster known as JA today.