Should books be adapted into movies?

The criteria by which movies and books are judged are different

Question: Should books be adapted into movies?
Position‹3 of 3: Books and movies are incomparable
Argument: The criteria by which movies and books are judged are different

What makes a movie good is not dependent on the screenplay alone.

The argument

A movie's quality is judged by how cinematography, acting, props, costuming and other film-specific elements are handled. Screenplay, though seeming to be the part of the movie that reflects the book most reliably, does not equal to the book manuscript. The format of a script is different, and focuses on dialogue. A book is more descriptive, and narrates details about the characters and setting besides the dialogue. A book can be good but have a terrible movie made out of it, and vice versa. Thus a book should not be judged from whether the movie adaptation was good or not, and a movie adaptation cannot act as an indicator for how good the book is either.

Premises

[P1]Movies are judged by film-specific elements like cinematography, acting, props, and costuming, while books are judged by descriptive narration of characters and setting. [P2] A screenplay differs in format from a book manuscript, focusing on dialogue rather than the descriptive prose that defines a book. [P3] Because the evaluative criteria differ, a good book can yield a bad movie and vice versa, so neither can serve as an indicator of the other's quality. [C] Therefore, books and movies are incomparable and should not be judged against each other.

Counter-arguments

Different technical criteria do not make books and films incomparable. Both are storytelling forms judged on shared dimensions — narrative structure, character, theme, pacing and emotional impact — which is exactly why audiences and critics compare an adaptation to its source in the first place. That a strong book can produce a weak film shows only that adaptation quality varies, not that the two works occupy separate, non-overlapping scales. The medium-specific tools differ, but the story being told is common ground on which comparison is both possible and routine.

Rejecting the premises

[Rejecting P3] Books and films share evaluative criteria at the level of story, character and theme, so differing technical criteria do not render them incomparable.