That's not the point. It was a pretty egotistical and disrespectful thing for her to say.
Why? Is Tolkien some untouchable God of literature? Can no one suggest that nothing he did is less than perfect?
If she thought aspects of the movies improved on aspects of his story, then she is perfectly entitled to say it, and quite clearly, people agree with her. If you dont then fine, but that doesnt make her egotistical or disrespectful.