Sampling Analogy: Not - so - accurate

In an article titled "Jay-Z Versus the Sample Troll", analogies are drawn between music sampling for rap music and the following:

novelists: freedom to use facts, borrow stock characters and standard plots
filmmakers: freedom to copy "standard shots".

I do not think that this analogy is satisfactory. While plots and characters are basic building blocks of novels and camera angles are basic building blocks of film, music samples are not universal building blocks of music or even specific genres, such as rap. A better analogy would be that certain tones, rhythms, chords, or music keys are basic building blocks of rap.

Novelists cannot freely borrow paragraphs from other novelists and filmmakers cannot freely borrow clips from other films.