It might help to borrow a smidge from Foucault's History of Madness. What impact does labelling have beyond a purely descriptive belief? Is there an ideological conflict between what is mad and what is not?

The simplest example that comes to mind is hysteria. We can easily see how this well discussed ‘ailment’ was actually an undercurrent of misogyny and class warfare.

This goes hand in hand with the various forms of dysfunctional medicalization over the years. From Lombroso to the medicalization of the woman, the African American, the Jewish Race, etc.

There appears much more at stake than benevolent labelling.