I think it's an interesting idea but it's a much larger problem than you're saying - your perspective is from the narrow position of knowledge work that pushes

I think it's an interesting idea but it's a much larger problem than you're saying - your perspective is from the narrow position of knowledge work that pushes information around, and it doesn't really matter when the information gets pushed around. But out in the real world, where things need to physically come together for economic activity to occur, synchronization is a huge deal. If you want a store to be open from 9AM, someone has to be there at 9AM. People will rely on that store being open at the stated time. It's not just ER staff - almost any other profession you care to name will not function properly if people just turn up whenever. Bartender, hairdresser, trash collector, construction worker, police officer, firefighter...