A single kata affords us an astounding amount of creativity, despite it being a fixed set of movements. The movements themselves are not representative of technique, they are rather representative of efficient and effective body mechanics for physical violence. Each movement is merely a template for producing kinetic energy in a useful manner. It is up to the individual practitioner how this energy is applied. Karate therefore becomes more about how you apply the kata, rather than how well you perform the kata. It also allows for the karateka's own personality, tactics and style. This is how kata is used creatively. There may be value in the calligraphy style zen exercise of kata, but the creative application of kata means you keep growing, you keep pushing yourself and keep learning.