The second problem is your belief that working long hours = working 'exceedingly hard'.
That's not really what he said, but even if that's true, nothing in your post refutes that. Someone who is working long hours, is working hard. They may not be working smart, but they are working hard.
Now, the rest of your post addresses why working overtime may not be beneficial to your goals. This does not fundamentally contradict grellas's point that the US model is based around the theory that skilled professionals should have the choice and that they have the knowledge and power to exercise that choice. In the US, if you don't want to work 100 hours a week -- or don't think it's productive -- you can quit. There may be some problems with this view but I don't see any convincing arguments against it in your post.
Lastly, I would like to echo tptaceck's comment that grellas is always informative, helpful, and exceedingly polite. Your disrespect was completely uncalled for.