If you look at examples of mental illness in non technological cultures, delusions manifest as djinns, demons, succubus and so forth.
I once had the opportunity to discuss this with a journalist who spent some time researching and reporting on mental hospitals in Afghanistan. Some of the people at the facilities they visited were deeply disturbed, so the extent that their families had resorted to tying them to a tree with a rope so that they wouldn't wander off and hurt themselves or other persons.
Almost universally none of them had delusions along the lines of the CIA putting radios in their dental fillings, antivaccine nonsense, or "5G causes cancer" stuff. Their delusions were all based on traditional cultural references such as djinns.
Reminds me of one cultural interaction - patients from western cultures tend to have far more negative and evil voices perhaps related to more Judeo Christian possesion by demons cultural baggage and descendant myths like "slasher who kills because the voices tell him to" (which defense attorney strategy cases aside are ironically real manifestationd of the culture bound delusion).
Interestingly those other cases tend to be more positive or neutral despite other posession myths in the host culture.
I guess anxiety and paranoia makes the "demons" whatever is believeable to the cultural zeitgeist.
I once had the opportunity to discuss this with a journalist who spent some time researching and reporting on mental hospitals in Afghanistan. Some of the people at the facilities they visited were deeply disturbed, so the extent that their families had resorted to tying them to a tree with a rope so that they wouldn't wander off and hurt themselves or other persons.
Almost universally none of them had delusions along the lines of the CIA putting radios in their dental fillings, antivaccine nonsense, or "5G causes cancer" stuff. Their delusions were all based on traditional cultural references such as djinns.