It's quite simple. This is yet another one of a long line of casualties, where everyone want to make the next GOT, but all they REALLY want is to ride an existing fan base vehicle to Emmy glory. This is writers and producers who want to take a book franchise and exploit the existing fan base, but don't really respect or love the source material and just want to use it as a vehicle for their own creative writing impulses. For instance, the books were filled with diverse cultures but rather than keep those intact, every country in the show was just this broadly multiculturally diverse flat mix of people. This was a focus group mess. It is what has plagued every other fantasy adaptation since GOT. They all want to be it but forget the lesson that doomed the last seasons of GOT: respect the source and fan base. Instead they all just use the fandom and then try to shoehorn their own "creative" vision into an existing story. It deserved to die and I'm glad it did. I had to re read the series for the the 33rd time just to remind myself what really happened after deciding to try the most recent season. They just double down on the nonsense changes.