Refusal of the Call to adventure within Movies

While looking through the monomyth spreadsheet I noticed that the refusal of the call to adventure is usually a decision made by the main character which makes sense, but in the movie that my group watched, Casino Royale, the main character, James Bond, doesn't refuse the call in a generic manor, instead he is suspended from MI6, the company that he works for, and has to go on his own to complete his adventure, for the most part. This is an interesting adaptation to the monomyth, where the refusal is out of the control of the main character, because it provides the hero with more of an attitude of self-reliance and perseverance despite the circumstances. Another adaptation to the refusal of the call is the lack of refusal, such as in The Dark Knight and American Sniper. These movies have characters that are so self reliant and dedicated to their cause that refusing it would go against the principle of these heroes, This is also somewhat the case with James Bond, as he would do anything for his country, but his country doesn't believe in his ability to do it which is why they refuse him.