It does seem to me that the author has injected their own theory of the state of mind of the crew, but in what way does this theory conflict with the NTSB's acc

It does seem to me that the author has injected their own theory of the state of mind of the crew, but in what way does this theory conflict with the NTSB's account? I agree that if there was evidence that the state of mind of the crew was a significant factor in the cause of the accident that they would have mentioned it, but this simply means they did not find sufficient evidence for this theory, not that the theory is incorrect.