Surely you see how using a search engine is a separate skill from just writing words?
Point is, people don't want to learn. Natural language searches in the form of questions are just easier for people, because they already know how to ask questions.
Any time we use words in a way that's different from a conversation it requires learning. That ranges from argumentation to story telling to, in this case, search queries. If it's different from talking to another human, it's a different skill.