You're not modeling or predicting anything though. That's like saying "what if I built a bridge that failed on the first day? A computer would need several days to calculate all the forces that led to the failure, but my bridge failed just fine without any computer help".

Well... yes. But try building a bridge that doesn't break.

Or to keep with your scenario, try to predict exactly where and how your stick will break before you break it. You can't.