Some books you learn 80% of the new-to-you concepts in the first 2 chapters. For sure living some place for 10 years you will know different things from someone that stayed for a few months, but travel is an incredibly efficient way to get new stuff you wouldn't have thought of in front of you to pay attention to. It's not to master all the variety in the world, it's to bring your experience outside of the little ruts that you can fall into. You have to travel with a certain attitude of openness, curiosity and respect. And the knowledge that your own ways aren't special, but just your own ways.