[danielbln]

Also, humans are squishy, you need safety requirements to keep them intact (seeing as human repair is incredibly costly and takes ages to complete, often with no guarantee that repair completes and performance levels go back to nominal), humans need sleep and can't work around the clock, and they have a mind of their own, which can make them difficult to deal with.

[SanderNL]

Indeed. Most of them are also bad planners and lose track of priorities very, very easily. Besides that, there is non-stop internal strife and quarreling as they are deeply social creatures that need to be in constant competition with one and other in order to be happy. You need another class of humans to "manage" these issues.

Once those two layers interact, you get a whole new dimension of problems you get to deal with. The creation of yet another layer of "management" is inevitable. It's basically management all the way up.

But man, once you get a bunch them aligned and motivated the sky is the limit.