You have no idea how many times I’ve heard that my character should have thought or done or been. You have no idea how many times I’ve had people assume what I was thinking when I wrote a book. I can tell you this: these guesses are incorrect. Whether stated in a positive or negative fashion, the jury is in: You have no idea what goes on in my brain.
A.S. King, “The Writer’s Middle Finger: Part Seven”
The whole essay is well worth reading. It’s not attacking reviewers for critiquing books they feel are flawed; it’s exhorting writers not to let their cynicism or prejudices keep them from writing the stories they need to write, and urging readers to judge the story on its own merits instead of rejecting it because it doesn’t fit their preconceived expectations.