If I'm working on something interesting I can do 8, 10, even 12 hours of coding without being aware of the time passing; but that's not the point, we're talking of averages here.
Also, some people in 2 hours can obtain the same results of me doing 8 hours of work - that's about quality, so the "woking-harder" it's not a valid argument: the real problem is "working focused"
You want to play a word game? Fine. Substitute whatever words you'd use for "working focused" with every time I used the words "working hard".
The point stands. Maybe I (or someone) just works harder/more focused, for longer, than you (or someone else). Why should that person hold themselves to your standards and not theirs?
Also, some people in 2 hours can obtain the same results of me doing 8 hours of work - that's about quality, so the "woking-harder" it's not a valid argument: the real problem is "working focused"