My goodness how you negate the magic and potential of the mind so easily.
It is factual that if someone believes something helps them, then if it soothes the mind then it is healing. I can't stress enough the "placebo effect."
People surround themselves by loved ones when sick, play music they love when sick, etc. It may not remove a tumor but you underestimate the power these simple things hold and how they heal and have a magical effect on the mind.
Banishing rituals are not needed.
The problem is too many juveniles seeing scary movies or wanting to be cool delve into things they are not familiar with and stick there head too deep in the sand without fully contemplating the consequences of such on their psyche.
As Aggripa puts it very clearly, "If we would call any evil Spirit to the Circle, it first behoveth us to consider and to know his nature, to which planets it agreeth, and to what offices are distributted to him from the planet." -Agrippa from Occult Philosophia (4th book).
Hence the problem is too many people delve into things they are not familiar with and the only true demon they need protection from is themselves.