The good girl is a good girl because she behaves as everyone around her expects her to behave.
She is, without a doubt, a good daugher. If she has siblings, she is a thoughtful sister. When she has a partner, she is a great girlfriend. When she marries, she is a good wife. After she gives birth (and really before that), she is a fantastic mum.
The problem with good girls, is that when the house of cards comes down the good girl has nothing. When her parents pass away, she is lost. It hits her hard. When her husband has an affair, she is shattered. When her children grow up, she feels alone.
I'm not saying that the same situations don't hurt bad girls, it is just that the good girl has spent her life being everything to everyone else and nothing to themself.
I am not always good girl. I am glad of this.
I sometimes fight too much for the things that I want, sometimes I am a good girl and do what others want. I need to learn when it is important to fight.