At first I would agree. Then I agreed with most comments saying that life is much more than work. But in the end it's probably more complicated than one or the other.

In school we are taught that everything we will do is for work. In most education system (except few countries) we are never given the opportunity to discover stuff just for the sake of it, or express our passions freely.

Everything we do is graded and our performance is judged in every topics we learn. Creativity is only rewarded at the beginning of our life (<7 years old) then it's about learning skills to have a job.

You can have side projects, side activities, but they are barely looked upon; unless it can become a job (professional: sport, music, etc...).