but not enough so that one person can set up a system that works for a realm forevermore into the future, without ever being looked at again. That would be tantamount to just removing resources from the game altogether.
That was never the case in any of the realms I was in. There were always special circumstances that demanded manual intervention(drought, looting etc.). In my opinion that's how it should be with resources. Once set up, things chug along nicely until something goes wrong. Only then is player attention needed.