Might one of the reasons be that these things are easily gamed? And maybe another one, that such workplaces by their nature select employees who would describe

Might one of the reasons be that these things are easily gamed? And maybe another one, that such workplaces by their nature select employees who would describe themselves as "driven, work-hard-play-hard 10x programmers not looking for a 9-5", and who upper management would probably describe as "suckers", at least behind closed doors? You know, the ones that believe that worker's rights and unions only benefit low-performers, and not alphas like themselves.