I agree with this sentiment in the sense that managers are now freed to do more important activities, as apps have taken over coordination of resources. However, this notion is usually meant in the frame of “managers will disappear because they are unneeded.”
In all reality — the emergence of the app in the Uber vs taxi argument reduces transaction costs of becoming a driver and putting drivers on the road. It scales. But I’m guessing that taxi “management” and Uber “management” have close to same number of people doing administrative activities in each market.
Management is still necessary in the Uber-ized world.