If anything, behavior that is based so much on learning is the unusual outlier. In the animal kingdom, primates (and mammals in general) are strange for how much they have to learn. Its far more efficient to have neural circuits already designed for the skills you will need. The tradeoff is that we are incredibly adaptable to the environment and culture that we live in and can continue to add skills and nuance to our repertoire for many decades. I may not have been born knowing how to navigate the Sargasso Sea, but at least I could learn how to post comments on Reddit.