Benjamin Olson
Hero
It absolutely doesn't. But when dealing with an intricate fantasy setting it's a dangerous game.Sure I am. But so what? The books are separate things. Again, how does changing the story make it bad automatically?
For example, my major issue with the Wheel of Time series is not that they changed things, but that every change they made, including some that had a lot of positive potential or were at least eminently sensible for the format, caused all sorts of aspects of the worldbuilding and plot to unravel and then be patched together haphazardly by television writers on a deadline. In that instance I think they'd have done better to adhere closer to the books, not because they are perfect, but because they were carefully thought through by a creator with a coherent vision taking his time, and that was better circumstances to nourish good fantasy than a tv show's writers room.
But that does not mean an unfaithful Tolkien adaptation couldn't be great, it just means that faithful adaptation is less likely to come apart at the seams.