14 hours being the high end certainly pushes the limits, but of the remaining 10 hours it would be possible for only 4-6 to be sleep (4 hours a night may not be

14 hours being the high end certainly pushes the limits, but of the remaining 10 hours it would be possible for only 4-6 to be sleep (4 hours a night may not be great for you, but they might sleep exactly the same amount with or without gaming), an hour for eating/grooming/etc., if they live with parents they may well have few/no chores/cooking/etc.... So perhaps not for everybody, but it certainly isn't possible to play 14 hours a day and spend a few hours looking for work. Even more so if you are at the 10 hours a day rather than 14.