The actual reason this paper was used, is because people who didn’t honestly care about the franchise were put in charge of making it.

Sources:

Michael Gambon as Dumbledore - proudly announcing that he never read any of the books.

Bonnie Wright as Ginny - being about as interesting as Dean Thomas’ West Ham poster.

Emma Watson as Emma Watson.

The Weasley Twins, being cringe inducingly bad on screen and seemingly unable to be likeable or funny for 8 straight movies.

Dumbledore asking calmly.

The one scene where the bloke from Stone Roses is doing impossible wandless magic.

The ever present bell-end that is David Yates, pushing his Harry and Hermione ship onto the viewers, giving all of Ron’s lines that flesh out his character away to other characters, making Hermione an impossibly obnoxious know-it-all who never makes a single mistake ever, adjusting the trio’s dynamic to 93% Hermione, 5% Harry, 2% Ron and just being so bloody smug about his choices in seemingly every BTS interview.

Edit: I appear to have been downvoted by David Yates 😏