As a novice composer who is interested in composing for films and other forms of entertainment, I was surprised to discover that in the state of the industry, the composer also has to largely play the role of the producer (which means also being the performer since most composers are expected to make convincing demos nowadays). The Classical composers, however, is only responsible for writing the score, which is essentially a manuscript of performance instructions. He doesn't have to be able to play all the instruments that are in his score, he doesn't have to edit the recordings of his works, he doesn't have to teach the violinist to play a convincing staccato. In other words, the Classical composer is but the architect, whereas the film composer is the architect AND the construction worker AND the civil engineer.
So my question is, what do you guys think of this merging of roles? Do you think it's fair? Do you think that this requirement of being technologically proficient impedes the success of those who are musically talented but not technologically?