In response to the point that the western, scientific point of view is ignorant and impotent to deal with demonic possession.. they don't even acknowledge that such a thing could happen.
My own experience in both the East and the West is that certain experiences respond better to exorcism, and certain ones respond better to some sort of psychiatric treatment. Neither seems to me to be the correct approach and the other the incorrect one, just different in view and methods, and therefore more or less effective in different circumstances. And a further method of dealing with some of these situations is with spiritual practice, which can also resolve the situation in approapriate ways.
very best wishes to you in the Dharma,