In my opinion it is important to have interests that are outside of your "basic" functions in order to expand your mind.
People who enjoy their work are generally more content, but that may not be possible for everyone - many jobs just plain suck.
Speaking for myself, I find the "Arts and Sciences" to be endlessly fascinating and listening to complex music and reading serious books are essential daily activities. I also usually watch an hour or 2 of TV, sometimes mindless and sometimes serious. I usually prepare my evening meal and that gives me some minor satisfaction.
Then there are things that occur randomly. Tomorrow I am going on a hike in the woods with a couple of friends. I have 2 beehives that require maintenance but I can go weeks without touching them. I do some occasional amount of woodworking, and some "craft" projects like screen printing. In the warm seasons I keep a moderate garden, and my yard does require some maintenance (ugh).
So this all falls in the "personal fulfillment" category and I am generally a happy and positive person. But, in the grand scheme of things, am I contributing to the advancement of the human race? Probably minimal.
Lastly, I derive no pleasure from complaining and accusing, so I avoid them if possible. But as I have watched the world become a more ugly and hateful (and, let's be honest, more stupid) place over the course of my lifetime, it is ever harder to maintain a positive outlook.