The value of retaining the adjective demonic even in psychology

This post argues that we lose something when certain psychological disorders are understood merely in medical terms:

One of the concerns with the medical model is that what used to be framed in moral terms is now being framed in medical terms (e.g., addiction). This is worrisome for a couple of reasons. First, it undermines personal responsibility. I'm not bad, I'm just ill. I can't, because of this illness, be held accountable for my actions. Second, if I'm ill my treatment is in the form of a pill. But no pill creates virtue. In short, the medical frame causes us to look for "treatment" in all the wrong places....
In trying to explain evil, identifying its causes, we unwittingly tame it. To explain evil, to understand evil, is to lessen evil. True evil can't be explained by psychology or history. Evil is inherently inexplicable. That is the source of its horror....
In short, even as a psychologist, committed to identifying the causes of behavior, I feel the need to keep this superstitious term, this term of darkness from an ancient enchanted era. A era of angels, devils and demons. A era of good versus evil.
There seems to be something important here. We need to keep a moral dimension to our understanding of psychology, even psycholigical disorders. Both a religious and a medical explanation can be unhelpfully exclusive.

The religious person argues, 'Because it's demonic, it must not be treated medically'. The medical person argues, 'Because it's medical it must not be treated religiously'.

Why not both? Could a demon not cause harm that might be alleviated with medicine? Could not an illness need to also be dealt with religiously?