But I think the author is cherry-picking just a bit. Aside from dismissing three massive movie franchises out of hand, she outright ignores other successful films that could be called fantasy like Rise of the Guardians, Kung Fu Panda, How to Train Your Dragon, Brave, Pirates of the Caribbean, and Narnia (which I would consider reasonably successful even though she doesn't).
Note that several of those are animated fantasy. I think filmmakers have pinned down several ways to create believable magic in an animated medium. (Pirates of the Caribbean and Narnia, though, are successful live-action.)
The Golden Compass was a big disappointment. I couldn't understand why they toned down many scenes to the point of changing the story—including the ending—but kept a bloody flying jaw. Just... wtf.
"Hey, it's a movie for children, but it can be badass too, I swear! Here, take this jaw right in the face and shut up!"
But the question is, how likely is it that non-animated fantasy will get mangled, and why? The odds do look bad.
But the question is, how likely is it that non-animated fantasy will get mangled, and why? The odds do look bad.
But not slavishly faithful if they are adapting from other media. Films and Books are different mediums and need to be treated differently. As an example, for me the book "1984" is very good, but the films of it have been poor. "Brazil" gets the tone and feel of "1984" right for me.You need a screenwriter and director who will be faithful to the source material I guess. They like to put their own spin on things.