Yes, I don’t believe any of them to be true. Most cultures got incompatible explanations to them, without a way to tell which is actually correct - my take is that each explanation is made up. And because people believe those explanations, they are not interested in digging into natural explanations.
Examples: seizures, schizophrenia, natural disasters, weather, infectious diseases
Not sure what is hard in it - you need consistent tagging, and that by itself gives you a lot of mileage in cost explorer.