Not to disagree with your general direction though, but i don't honestly think i could boil what i do down into 2 hours. On paper? possibly. In practice i spend far more time thinking about problems, taking breaks from problems, etc - than i do actually writing the solutions. But i'm not claiming i'm any good heh, just that it often takes me hours and hours.
Your assertion is generally correct i think in efficiency sake. Ie when i put in 14h days, i'm exponentially paying a higher tax on my efficiency by putting in extra hours - i'm over worked and tired, i'm far from my best. But i still think i can more work done in those 14h than i do in 8, or especially 4/etc.
How many people work as prison guards watching over people on harmless drug offenses in the US? How many soldiers are stationed or fighting in pointless wars? How many loggers work in the Amazon, or how many poachers? I'd much prefer they take some of your work instead.