Just because the debt could be made irrelevant long before it’s due—not to mention long after the story is set to be finished—doesn’t mean the “certain rights [that Malfoy has] over [Harry] before then” won’t be a major factor in the story.
Just because the debt could be made irrelevant long before it’s due—not to mention long after the story is set to be finished—doesn’t mean the “certain rights [that Malfoy has] over [Harry] before then” won’t be a major factor in the story.