I think it's the social aspect of it. There are people who feel lonely at home and really need some people around them most of the time. I enjoy wfh usually. It just takes overall less energy since no commute, can take a nap if I'm tired and catch up to it later if I'm really tired or take a quick cold shower in the middle of the day, step outside to a nice coffeeshop for an afternoon tea. I'm an engineer, so I usually enjoy the actual quiet in my room when I'm working. For some, having people around them is more important than the freedom, flexibility and relaxation they can get at home. Too bad :)