That only scales to a point. When there gets to be enough work, making it everyone's job ensures that it becomes nobody's job. Usually because one person was doing anyway in an informal capacity, and now they're overloaded.

Source, seen it play out in a non-technical nonprofit that after years of stagnation, went the other way of hiring executive staff to run the day to day stuff. And from currently being part of another organization that is flailing that way presently.