True, but the people who developed brain scans and quantum physics aren't the same ones who spread ideas about demons, and the two groups aren't really comparable. Seeing as I've volunteered in the radiology department of a local hospital, I'm inclined to think that the people who work on such scientific matters do a lot more good than exorcists do.
I think that if people in the United States were better educated about science there would be less of a problem with it and fewer people retreating to supernatural ideas about demons. It isn't completely teachers' fault though, education seems to be of a low priority to our government and is terribly underfunded, especially in poor communities. That is a shame too, because education should be the most important duty of a government to its people, and if people cared more about it we'd have a much better society.