Because a single machine gun could take out half a squad within minutes it would take a rifle much much longer to do the same thing so machine guns are seen as superior
Disease, Armor, Guns, and Horses
The Inca Empire, or Inka Empire (Quechua: Tawantinsuyu), was the largest empire in pre-Columbian America. The administrative, political and military center of the empire was located in Cusco in modern-day Peru. The Inca civilization arose from the highlands of Peru sometime in the early 13th century.