Not only is perfectionism's "disciplined" approach unnecessary -- it is actively destructive. It makes beginners feel like they aren´t good enough and experts feel like they are never, ever finished. It is the worst.
The concept of perfectionism is Puritanical and ludicrous -- it presupposes that all we do in the name of "discipline" (a joyless activity) has a positive effect on creative output.
The truth is quite the opposite. The destructive consequences of this all-too-prevalent attitude in the western world is so extreme that it can destroy the confidence of its practitioners.