Questions are the easiest content to rank
Question keywords (who/what/how/why) usually have lower competition than declarative keywords on the same topic. "How long does plumbing repair take" is easier to rank than "plumbing repair."
They also feed featured snippets, People Also Ask boxes, and voice search results. One well-written FAQ-style article targeting 5-10 related questions can generate more traffic than a 3000-word guide.