You're missing my point. I'm not trying to deal with the 'conditions' that individuals or groups say they have. My point is that if a group says a person has a condition it's considered real, but if an individual says so, it's not. It's a point about deferring to authority over what is existent or not.
Who defines conditions, says that ADHD is real, for example? It wasn't in earlier generations. The are terms of social (group) art - special names that are generally accepted as meaningful.