Look brother you’re not winning any points by implying that you’d be the guy to invent A* on the spot. Without formal education you’re almost certainly not even dealing with concepts like breadth-first search, trees, or nodes, so no, a ton of people will not be inventing it on the spot.

Edit: most people don’t even think about recursion as a possibility until taught about it in a formal setting, and even then it’s typically a struggle to understand. Even using a queue, that’s a data structure that a person with a task to do isn’t likely to spend the time to invent on the spot.