Yeah i somewhat know that theory and it makes sense But you have to see how much has to go right in that process.

The pottery clay just happens to contain metals. That's just luck. The metals melt at a low temperature, luck People figure out how to recognize metal ores Refining ore Building kilns that can get hot enough Adding carbon to make steel from iron.

Its similar to how the Chinese just never really figured out how to make clear glass. Causing them to never develop glasses