That's the problem with attempting to use Wikipedia as an authoritative expert source: it's not, and it's not what it attempts to be. The part about marked eff

That's the problem with attempting to use Wikipedia as an authoritative expert source: it's not, and it's not what it attempts to be. The part about marked effect on the life of a would-be patient would not be explicitly stated amongst DSM diagnostic criteria, as it is not a symptom of the illness in question, but rather something most mental illnesses have in common (i.e. a large part of the reason for viewing mental disorders as illnesses). However, the second sentence in the Wikipedia page on GAD (to which you linked) starts "This excessive worry often interferes with daily functioning". Seeing "excessive" used in the context of the listed symptoms (DSM-5, your link), I'm hard pressed to view this as any sort of attempt to cull diversity. As it is rather late in my timezone, I'm not going to go trawling for definitions, but if you're interested in reading more I can recommend NAMI, NIMH, the Mayo Clinic, etc. as good starting points. As this isn't my area of expertise, I'm in no position to argue the specifics of ODD, but it has always been somewhat controversial [1], and particularly around the release of DSM-5, IIRC. But even if the whole world were to agree that ODD was poorly defined, or pehaps even concede that it was "designed to enforce normal behavior", it would not really say anything at all about neither the disease model, nor the field in its entirety. Regarding ADD, the major controversy seems to be about possible overdiagnosis, and to some extent about relying too much on medications as opposed to therapy, AFAIK. I think there are several legitimate issues here, some of which are likely specific to culture, some to specific socio-economic contexts, others perhaps to the handling of ADD at large. [0]: https://en.wikipedia.org/wiki/Generalized_anxiety_disorder https://en.wikipedia.org/wiki/Generalized_anxiety_disorder [1]: https://en.wikipedia.org/wiki/Oppositional_defiant_disorder#History https://en.wikipedia.org/wiki/Oppositional_defiant_disorder#...