Curiosity is a basic trait of humans, and thus will never be satisfied.  As when we were infants, we have a sponge-like desire to learn about our surroundings.  Whether through science, philosophy, or any other means, humans have an inherent playfulness and desire to learn, even as we don’t know particularly why.  We do so because we are a special organ of the Universe designed to help the Universe become conscious of itself. The more curiosity we have, the more the Universe learns.