I agree completely with you here, the numbers are obviously padded vs what many normally think is "work". But the reality is that many actually work far more hours per day than they realize if the use a similar definition of "work" as what's used for Musk's number here. How many of us lay in bed thinking about a tough work problem? While quickly snarfing down food sitting at your desk, are you not reading emails or similar? Do you go to networking events and talk business? That's all "work" technically if you're being liberal with the definition (and honestly, it's not unreasonable to call that "work").