The main reason it wasn't published is Tolkien didn't get things how he wanted them to be and kept changing things up until his death. Finrod's status as Galadriel's brother was one of several origins Tolkien played with and I think it was in the last few months of his life that he changed the story of Galadriel and Celeborn so he was actually an Amani Teleri (giving him a nice promotion to Caliquendi) and the two of them met before sailing to Middle-earth.
It's not an origin story, it doesn't explain what the Hobbit's first ancestors were like when they awoke in Hildorien, when they split from the other Men or when they became halflings (if they didn't awake that way.)The most egregious part to me are the Harfoots. They're creating an origin story for the Hobbits when there is none. Now, Harfoots are written about but there's no detailed story about them. They're writing it from scratch.
No what irritated him was making changes to stories he had spent a lot of time perfecting without artistic or technical reasons. At an earlier time he expressed a desire to create a grand mythology with some parts written in detail and others just sketched to allow "other minds and hands wielding paint and music and drama."It's the kind of thing Tolkien showed time and time again that it would irritate him the most. The Hobbits do not have an origin story because there isn't one. Tolkien didn't forget about it. He didn't write it. Full stop.
It's for fans of Tolkien who want to see his world, characters and events brought to life.Who exactly is this show for I ask. As a fan of the books I'd rather know before hand what's going to happen in the show then get surprised every week with a new deviation.
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I'd argue the Jackson movies showed more disrespect by making changes to a piece of work Tolkien spent so long perfecting with really egregious changes to the way some characters are portrayed.