well I mean, I write stuff (or at least I used to), and I put a fair amount of effort into it. I thought about what I wanted the characters to look like, how they should sound, and what was going to happen. If someone came in and said something along the lines of "The main character is blonde and has blue eyes, an obvious callback to hitler's ideal, coupled with their manipulative actions indicates that [blahblahblah nazis]" or someshit they are putting words in my mouth. I might have made the character blonde and manipulative as a reference to Barbie and how that doll affects how young girls think. She might be blonde because it is seen as an indication of dumbness, and put the manipulation in there to counter that. Maybe I just wrote about a manipulative character and happened to want her blonde. The people making these analyses don't know what was going on in my head unless they or someone else has talked to me about it, so why should they just assume that I meant a certain thing?
The thing about Twilight is that we know where the basis of the story came from. Meyer had a dream that she was laying in a field with a beautiful, sparkly vampire-man and wrote 5 books about it. This guy's interpretation of the story is really interesting, but the book isn't marketed that way, it is marketed as a coming-of-age love story, so you have to at least take that into consideration, because that affects who reads it and why. Sometimes it is really easy to come up with bullshit about a narrative, and it is just as easy to be way off the mark. I remember a friend studying a poet in English at high school, and her teacher talking about what the author meant when he used certain phrases or imagery or whatever. They were able to get the poet in for a talk, and the teacher asked him about some of the stuff that had been talked about, and the guy basically contradicted all that they were taught.
I am not saying that people can't read things differently and that you should only read stuff a certain way, I just think that disregarding all readings but one is stupid.