I have no idea why anyone would voluntarily hammer a nail using a forehead instead of grabbing a hammer - tool made for the purpose. Imagine that you are in a

I have no idea why anyone would voluntarily hammer a nail using a forehead instead of grabbing a hammer - tool made for the purpose. Imagine that you are in a method X, which is called from 100 other methods. Method X crashes, but you don't know what method the wrong data causing a crash come from. In your scenario you will be putting 100 different printf. While somebody in debugger will just have a look on stack and will see it.