[biogene]

IMO, you can take the dev word out, many productivity metrics are of dubious value, because corporate people love applying structures and systems to problems, only due to the fact that it is a structure rather than any inherent benefit.

Person A might need a completely different style of management/metrics than Person B, and Person A after a year might need yet another style of management/metrics. Its all messy and ad-hoc, because such are humans.

(Not a perfect analogy) If you replace humans with processors, and work with code, its the same efficiency paradox that devs know all too well. You apply an abstraction to solve a design problem, even if you already are aware that the Good™ solution is a hardware specific optimization or a new API design just to solve that one problem. Abstractions are seen as seemingly scalable, give you flexibility and leverage in other ways so they are Better™.

Performance focused devs are the complete opposite they give you maximum efficiency, by have a near-perfect match with the code>compiler>hardware. But at the significant cost of increased dev timelines, code complexity, stress, etc. The manager equivalent here would be the same where they are able to match their own style to the specific person they're managing. But these styles are impossible to create a universal system around.