There is a duty among guideline makers to do no harm. If a set of diagnostic criteria is weak scientifically, and a lawsuit against an employer is filed, consider a cross claim against the negligent guideline maker, the APA.
1) This threat would make the APA more conservative in the sense of greater proof of validity for any new diagnosis.
2) It would deter the frivolous expansion of psychiatric diagnosis into normal but bad for you behavior. These no only stigmatize normal conduct unduly, it destroys the credibility of heavy duty, dangerous, psychiatric disorders.
3) Whatever the assets of the APA, they are dwarfed by the endowments of the parent universities employing the members of the DSM V committee.
2 years ago