When limited by words and formatting, an author specialized in short pieces learns to create the largest picture with the fewest words. When adding the requirement of brevity to the mix, it becomes increasingly necessary to choose more accurate words. With a larger vocabulary, one may select from a myriad of words fitting the phrase on a variety of levels.
Simple Example: Character has a thought, turned to desire, then to action. In short form it reads:
I wish to see you.
I want to see you.
I will come see you.
These three sentences convey the wish, the want and the will or thought, desire and action. In a novel, the same process may take chapters, but in short form the essence & the melody of language require simple precision.