Well, if you are self-employed, you can't unplug. That much is true. But if you are in a business with others who can cover for you it's good practice in case

Well, if you are self-employed, you can't unplug. That much is true. But if you are in a business with others who can cover for you it's good practice in case tragedy strikes. If the business can't survive without each member, that's a heck of a lot of risk. It's better to have someone else in the business able to resolve those emergencies than have no idea what to do when you fall off a building or get hit by a bus. And if you are the CEO, think of that as training time for the the next guy.