You already know the feeling: one part of you wants to leave the job, another keeps you at the desk. Willpower turns that into a fight, and the part that loses simply waits. Parts Therapy takes the argument seriously instead: we speak with each side, find what it has been protecting, and let it agree to a better job.
Nothing is banished. The habit you're fighting was almost always a solution once, and it stops running the show when its original purpose is finally met. That's why the change tends to hold rather than need constant maintenance.