[slightwinder]

> Some things are only finished when they are finished.

That's how you end with never ending and dying projects. Projects which are dragging for years and decades because the creator just does not "feel it" and at the end abandon them and never releases them. Thinking about the end goal is especially in creative work highly relevant. And a deadline is a good tool for this, as it forces you to think about. And a deadline can be changed, if done with good reasoning.

> GTD recommends to set as few deadlines and calendar dates as possible

GTD also makes a great point about reviewing and analyzing. And a deadline is a tool to force one to review and analyze a project, it's state and goals.