I disagree.  It will depend on the person.  Some people like to be intellectually challenged, others, physically challenged.  Some people crave contact with others, or with children.  I have a friend who is obsessed with esthetician stuff and she does this for free on her friends, just so she can have the pleasure of performing these activities.

We as a society have tended to equate any type of effort with economic survival, so we tend to overlook the other aspects of activity which can bring benefits.