He would regard it as a form of neurosis.

Jung clearly explained that neurosis is: “always a substitute for legitimate suffering” which means that procrastination is done out of the desire to avoid pain in our lives.

Nobody fundamentally wants to feel pain, so we do whatever we can do to avoid pain. This is an effort to protect our ego from the reality of pain and how it can break our egos down if we let it. However, when we attempt to delay suffering by replacing pain with temporary pleasure, our growth is always delayed.

Why?

Because growth requires suffering, for when growth stops, decay begins.

This is why we always need to accept pain as a required for growth.

The pain of going through challenges you have never done before (call to adventure) in an attempt to expand your consciousness and build confidence through experience (by making the unconscious conscious) is so that you overcome your own fears. This is necessary if you want to build any form of personal growth in your own life and be on your path towards individuation.

Procrastination by definition blocks our journey towards individuation.