Amdahl's Law applies cleanly to human processes.
Perhaps the most revealing example is the origin of "computer" as a human occupation and how scaling the compute process happened at Los Alamos https://ahf.nuclearmuseum.org/ahf/history/human-computers-lo...
The more general aspect of Amdahl's law is captured by certain scaling laws and limits generally related to communication (see full bisection bandwidth) and certain architectures (e.g. Cray) meant to optimize for this
It semantically works but it has not been adopted by people outside computing, I'd guess think the definition isn't relatable or understandable enough for people coming from humanities/biz backgrounds, so it might well be possible that there's a parallel concept there.
The more general aspect of Amdahl's law is captured by certain scaling laws and limits generally related to communication (see full bisection bandwidth) and certain architectures (e.g. Cray) meant to optimize for this