> This seems very basic

Yes, this is not some sort of hard-fought wisdom.

It should be common sense, but I still see a lot of experiments which measure the sound of one hand clapping.

In some sense, it is a product of laziness to automate human supervision with more agents, but on the other hand I can't argue with the results.

If you don't really want the experiments and data from the academic paper, we have a white paper which is completely obvious to anyone who's read High Output Management, Mythical Man Month and Philosophy of Software Design recently.

Nothing in there is new, except the field it is applied to has no humans left.