this is not being unfriendly. just a way to close prevailing loop-hole in the system.

although OPT was intended for "employment in the field of studies" numerous people were working on odd jobs throughout the period. (for whatever reason)

STEM extension clealy wants the employer to use everify and only allows currently employed students. [ here employed = in the field of studies ] hence, there is no extension if you are not employed. i.e. if you are laid off at the end of 12 months OPT then you cannot apply for the 17mths extension.