Interesting question! As the article says, success is found within us and not by satisfying what society foists upon us. But when it comes to design for business, success IS largely based on how well the external needs (that of the client and project objectives) are satisfied and not so much on our personal goals and interests. Yet, doing what is right by a professional designer’s own creative standards is usually also what is best for the client, as long as it fulfills the business objectives and the clients needs are kept at the forefront.
The pitfall, however, is that designers (especially young ones) can quickly fall into the realm of “personal art,” where they focus more on aesthetics and lose sight of the client’s interests — sometimes without even realizing it. So this poses an interesting dilemma and one that designers should pay attention to as they proceed in their careers.