All this shows is that we need a work-week hour cap.
50 hours a week for most professions, 60 hours a week for doctors.
I get a lot of shit done working ~60 hours a week. That usually means 20 hours a week of nobody else around, so no phone calls, no questions, no inane chatter. Just you and the work. Feels great to be weeks ahead of some deadline so despite the hours, you're never scrambling to get something out the door.