Anybody can roast some dead animals on a stick or boil vegetables inside a pot full of water, but having a proper technique and equipment for everything going all the way from milling grain to mixing the powdery grain flour with water and a starter culture, letting it ferment in a proper space so as to allow it to remain somewhat moist but not excessively moist, and finally kneading it into a shape pleasant for the eyes which actually has a good density (in correspondence with the type of bread it might be) and baking it at the proper temperature for the right amount of time are all fine skills which only great artisans in a culture that allows for people to develop such abilities to rise.
https://youtu.be/9Ekk4JCb6OMThey might seem common, but it's only because it's knowledge that has been transmitted to us by people who collectively gathered their knowledge and experience regarding the making of this food product that we have been able to make it the way it is currently known by people around the world.