And earlier than you marvel how somebody can kill so many with a bow and arrow: folks hunt moose and elk with bows and arrows and one correct shot can fell one.
In addition they do not make a lot, if any, noise. A firearm even with a so-called suppressor on it makes a number of noise. A bow cannot be heard over folks speaking, particularly if the archer has taken steps to make it quieter. Somebody may probably sit excessive up and take poshots and somebody must really see them to know the place they had been coming from.
Along with that, there is a profound distinction between a longbow or recurve, which is your primary stick and string, and a contemporary compound bow.