The website explains it clearly enough I would say.
Never attribute to malice what can be adequately explained by incompetence :)
I bet the RoP team are great content creation professionals. They obey all the rules of their craft.
They also do not care about the material at all, otherwise they'd be script writers and directors, not content creators.
That's funny, because that's very much not what happened with those movies. Remember the character assassination of Faramir? I recall Jackson (or perhaps Fran Walsh) saying in an interview that they deliberately broke from Tolkien's story with that one, because the way Tolkien wrote it didn't fit the story they were trying to tell. They felt that having someone set the One Ring aside when tempted undermined the idea of building up the Ring as a threat in the minds of the audience. In other words, they chose to go with the story they wanted to tell rather than honoring the story Tolkien told.
Certainly the LOTR movies weren't as flagrant as Rings of Power with the liberties they took. And some of the changes were indeed due to the constraints of adapting to the medium of film, rather than a book. But even so, they chose to disrespect the source material pretty blatantly at times.