[jjk166]

You like 4/4 western music and want to play it, but you are clearly aware of alternatives. As soon as you know what a time signature is, you know that there are many possibilities. Maybe if someone knows nothing of music theory and has never heard anything that wasn't 4/4 they would be unaware this was a variable parameter, but that's exactly the kind of user who needs a simple, user-friendly default.