Writing was the equivalent of the high tech industry.
Only one percent of Egypt could read and write. It was the scribes' secret knowledge.
The National Archaeological Museum in Athens, Greece, in its section on Egyptian Artifacts, has a display on “Scribes,” stating:
"Only a small percentage of ancient Egypt’s population was literate, namely the pharaoh, members of the royal family, officials, priests and scribes.
... Particularly popular and lucrative, the scribe’s profession was mostly hereditary. Scribes had careers in the government, priesthood, and army. They began their rigorous training in their early childhood.
Most of their training took place inside a building called the "House of Life," attached to the temple. Scribes wrote on stone or clay sherds."