I quite like that movie analogy, tbh.
I mean, the director is the one who chooses whom to cast and for what part. And when for some reason, his first choice is unavailable, he has to make do with the second best. And as a director, he has to get the best out of his actors. Some actors may have forceful and expressive eyes and so when you are directing them, you try and concentrate on that a lot, because it makes them look good. Some actors are better at dialogue delivery and you make sure such guys get a lot of the good lines written for the movie. Some others just have a great screen presence and you concentrate on that.
Similarly, in cricket, you have batsmen who bat better at certain positions and certain situations and you try and utilize them in that role. Ditto with bowlers. So, I think the captain's role in cricket is quite analogous to the role of a director of a movie.
But the only thing is, I think the coach has a part in all of this as well. So, for me, both the captain and coach are like the directors in a movie. Only thing is, I guess, with the captain, it is like a director who is also playing a major role in the movie. With the coach, it is the case of a director who is only directing and not playing any roles in the movie.
That is the closest analogy I can come up with from the movie world. lol.
But the point is that these days, both captains and coaches (and senior players and selectors) are all involved in off the field planning these days. The main reason why the captain is always more important than the coach is that he has to make the on-the-field think-on-your-feet decisions. And sometimes they do affect the outcome of the match. That is why a captain gets a lot of cheers/jeers for his teams' good/bad performances. And I think it is quite right too. The role of the coach is always secondary to the captain, IMHO, but not all that insignificant as some of you think. AT worst, he can at least be the mentor to the guys who are not playing, whose confidence is low etc. He has a whole variety of stuff he can do and stuff that can make a difference in the end analysis to the performance of the side.