I disagree with their implications of what "insight" is. It's not just knowing you get anxious because your mother left you when you were 4, that's only half; the other half is understanding, in your bones, that you survived, with no one's help and, as a result, can probably do so again so worry (fear for the future which no one can predict) needn't stick around, you can be sad and disappointed that your girlfriend left you but you'll get through it. A therapist that only works on pointing out the first and not the second isn't worth their salt to me.