I guess because that enforces the documentation to be good enough so that someone without the faintest idea of what the software does can operate it. Probably

I guess because that enforces the documentation to be good enough so that someone without the faintest idea of what the software does can operate it. Probably this approach is more scalable specially in big companies where you can have operation teams on-call for a myriad of project. I personally believe that this does not guarantee a better service.