I don't think you read the posts. @DarthEbriate talks about things that the docs cover and no one in this thread has called LOTR or The Hobbiit a cash grab. I saw the docs and I know what they went through to make those movies and they still screwed them up. I've a mild interest in seeing Mortal Engines, but because it's a PJ film and world, have had little motivation to fire it up.
While the Tolkien movies are "made well", and I totally think they are, the artistic choices were bad. The quality of the film-making is what, to me, makes them worth watching, not their interpretation(s) of the stories.