Most diseases are artefacts

The bacterial mesosome was enthusiastically studied and debated in the 1950s and 1960s, people would discuss its meaning and origin, and all was well. Except it didn't really exist. Gradually, going into the 1980s, people realized that it was an artefact, created from the process of chemical fixation.

The story of the mesosome is a good example of how people can get all exited about something, and agree on it being important, even though what they got exited about didn't even exist.

So that most diseases are artefacts, created through hospitals (nocosomial) or artefacts in general from society (such as "executive disorders" where society actively interferes with decision-making capacity of individuals, slavery, but refuses to acknowledge doing so) can be expected because of how good people are at believing artefacts are something else.