Look at it this way... the windshield is about the cheapest exterior damage you can do and 'repair' to the point that there isn't the slightest hint of evidence that it ever happened.

If it had hit any part of the body then you'd have to worry about removing the scratch/ding matching the paint, and worried that it either wouldn't look quite right or would end up as the spot from which rust would begin to form in the future.