The claim was "work != letting your attention drift to wherever it wants to go".

Once you have disciplined yourself to direct your attention, it can be fun to execute a task, sure. But I am very skeptical that very many jobs consist of letting your attention drift to whatever is most shiny, with no effort to direct it. Even in those jobs, I suspect the workers would be more effective were they occasionally to direct their attention to what is most useful rather than most shiny.