None of us are born with this knowledge. We have to take action and learn from it. Intelligence is the ability to learn, ability to solve problems, the ability to grow, and the ability to survive. It is doing what you need to do, not simply knowing the square root of the world's circumference. Some people seem very intelligent, yet they can't pee without a guidebook to tell them how to find the bathroom.
People are intelligent when they do what they do to survive.
There can be two highly intelligent people who know absolutely nothing about what the other one does. No, it would be foolish for them to waste time learning something they are not going to use to improve their lives. If you're an accountant don't just be average, be a black belt accountant.