Some things that probably factor into the industry's disagreement: Peter Jackson adapted books fifty years old and respected as great literature, the Potter books were being written alongside the first movies; Lord of the Rings centered on adult characters and played to a wider audience with PG - 13 ratings, the first Potter movies were PG, skewed younger, and starred kids (though anyone can see the
films matured and so did the fans, many already wrote the series off); finally, where Jackson provided one
distinct vision and a cast of respected performers, Potter had a rotating director roster (all of them secondary to Rowling) and limited opportunities
for its accomplished actors, giving the brunt of the work to the three kids and spectacle.