The balance of humor and horror is where the real genius of this story lies. Stephen King knew that, and so did Brian De Palma, who let Piper Laurie think "this has to be a comedy because it's so over-the-top" while she was playing Margaret.
By getting the audience to laugh as well as cringe, you turn the tables on them. If they're laughing at Carrie and her mother and Chris and Billy, etc., aren't they just as bad as those girls in the gym class?
Getting us to think, "this shouldn't be funny, should it?" is the perfect approach to the material, and not an easy balance to strike.
But that's the challenge.
By humanizing all the characters and removing the camp and comedic undertones, you take away the mirror pointed at the audience while they see (or read) this story.
That just tells me creatively you don't get it.
"Jaws is the Citizen Kane of movies."
blocked: logan2, Diamonds3, Hamilton22