As I said, I didn't want to mean that everybody should work hard or that professional success is the only important thing. But I think that in order to succeed in a competitive field, one has too work hard and it's definitely doable.

That being said, I'm an advocate of less working hours and more vacation. I worked in the US for a couple of years, and this is the one thing that made me go back to Europe. Free time is the most important thing in my opinion.