The most successful people I know work much more than 40 hours each week.
Granted, none of those people are grinding away working for The Man. Instead, they are running their own organizations.
Is that not your experience?
The attitude pervades their life.
* You know how most folks sleep and drink when they fly? They work on their laptop.
* You know how most people come home from work exhausted? They come home energized by the things they worked on, filled with new ideas.
Talk to someone who owns their own business working 60 hours and then someone who's being forced to work 60 hours for their company and you'll be talking to two people with vastly different outlooks.
I agree with you, but the point stands. They're able to be productive and happy while working more than 40 hours per week.