I think it comes down to how extreme the relation is. In the article there ia a large portion about abusive relationships and other cases warranting a therapis

I think it comes down to how extreme the relation is. In the article there ia a large portion about abusive relationships and other cases warranting a therapist's intervention. In these situations, sure parents behavior will leave a strong and lasting impact on children. For more standard cases, parents will provide a supporting enough environment (even if not perfect) and will make their kid interact more with the world, be it school, activities etc., limiting the impact of their own direct behavior. To get back to your point, parent's thinking and behavior is fundamental IMO, but usually not just in a direct, person to person way. It would be more on the environment and social position they provide to their children.