This does seem partially misguided - Tim Ferriss himself does say that he spends a lot more than 4 hours a week on projects, because he doesn't see that as work, instead they are projects he chooses to do because he enjoys them (similar to the author of this post).
Exactly the reason why i didnt like the 4 Hour work week by Tim Ferris. I enjoy what i am doing and would rather improve my work experience if i wont find it enjoying anymore than to travel around the world todo "fun" stuff while other people earn money for me.