The act of existence is explicitly so in our namesake. A human, being. The unfortunate reality is that, for most humans, simply being does not suffice. As a result, many seek answers to questions such as:
"Why are we here?"
"What is our purpose?"
which are currently out of the scope of human comprehension to answer adequately, short of accepting that we're here to exist. Our purpose is to exist. We aren't called Human figure-it-outs.
Rising in parallel with our knowledge as a species is our ego, and with that growing trajectory, a further disconnect from the natural world.