How could Dr.Phil say "the predictor of future behaviour is past behaviour", considering what he does on TV? See detail?

People change all the time. 1) Friends/ relatives/strangers help them to see what they are doing 2)they see a therapist 3) they see another person who behaves the same way, and that gives them a jolt etc. And Dr. Phil knows that, so what does he mean? Even if a lay person says that it makes no sense.