I think that people tend to underestimate the actual complexity of manufacturing.
It’s hardly turnkey. Every process has its idiosyncratic interactions with other processes, whether it is variability in feedstocks, interactive variability in various product stages, getting the bugs worked out of a newly installed machine, buggy intersystem comms, structural vibration of the factory structure itself, process timing to deal with those vibration issues, etc etc etc etc.
The overall system complexity of even a modest modern factory is orders of magnitude above say, 1940s style manufacturing which is what most people visualise when they think of a factory.
It’s hardly turnkey. Every process has its idiosyncratic interactions with other processes, whether it is variability in feedstocks, interactive variability in various product stages, getting the bugs worked out of a newly installed machine, buggy intersystem comms, structural vibration of the factory structure itself, process timing to deal with those vibration issues, etc etc etc etc.
The overall system complexity of even a modest modern factory is orders of magnitude above say, 1940s style manufacturing which is what most people visualise when they think of a factory.