Its not even so much about the 9 year old winning a race. ANakin Skywalker was the posterchild of the Cloner Wars (canon queeq, 😛). If my last name was MacArthur, and I had no knowledge of my parents, I might go..."Hey! Maybe I'm related to that guy."
Then again, the Lars family told him he was the son of a Spire Frighter Pilot, which is one of The Clone Wars' fabulous tie-ins.