Gendered arts?

Workshop of Wrought Iron Painting in the 1980s.

Before I saw this picture, I always imagined males as main forces to produce wrought iron paintings. However, females seems to be main forces of producers.

Look at hand tools for the paintings: hammer, wrench, benders, twisters, chizel

A blacksmith master is making hand tools for wrought iron paintings

Why are masters all males?

Chu Jinxia: The only female master?

Chu Jinxia: Eight Immortals Crossing the Sea