A trade passed down, not taught
In the metalworkers' quarter of the Marrakech medina, brass has been cut and pierced by hand for centuries. A boy sweeps the workshop, then holds the sheet, then marks it, then cuts it. By the time anyone calls him maalem, master, he has spent a decade at someone else's bench.
Nothing about this is fast, and nothing about it is written down. The knowledge lives in hands.
No school teaches this. Only a bench, and years.