We are humans because we have to be something. If we were not humans, we would be something else, maybe floozamoobs. And if there were floozamoobs, they would wonder why they are floozamoobs and not humans.

There is no intrinsic purpose to life. It's just something that kind of happened. But the way I see it, there could be no better way. Since there is no pre-defined reason for you to be here, you are free to define the purpose of your own life as you see fit. And that is the greatest freedom there is or ever could be.