IMO they are for protection alone, and the US styles are intended to be removed before using the iron sights. I also draw your attention to various UK-made bolt rifles with folding hoods, IMO they are intended to be folded before using the sights. I can think of no instances of sporting rifles with non-removable or non-folding hoods, and this leads me to believe that the makers intended them to be easily removed or folded. This follows my own thinking, I want as much light on the front sight as possible and that means no hood. Plus, the need for a special safe temporary storage place for the hood is an excellent justification for having a trap door buttplate(G)!
Regards, Joe
