Consider this 're-make' business that is taking away opportunities for new ideas and new films to happen. If the movie was made right the first time, why make it again? The only reason this is happening is it has become a safer way for the Studios.
Originally a record producer more or less hired a bunch of professionals to participate in a recording session, the performers and the technicians, and a music director was put in charge. That directly related to a film producer's job.