"Psychosis" here is best understood as an *analogy*, not a diagnosis, and, as already noted, there is a large cohort of very persistent people who make it their business to eradicate analogies that make reference to medical or health-related phenomena. But these analogies are very hard to kill, because they do useful work in connecting unfamiliar, novel phenomena with things we already understand.
It's true that these analogies *can* be stigmatizing, but they *needn't* be.
14/