Actually, I don't think there is an "of course" about Jesus being a carpenter. Following his encounter with John the Baptist, all the Synoptic Gospels record Jesus preaching in the synagogue in Nazareth (to no good effect) and give an account of his itinerant preaching (more effective).
Saint Joseph (Jesus' earthly father) is described as a tektonbut only St Mark describes Jesus in the same way. While tekton is traditionally translated as a carpenter and Jesus, I think, is described as making ploughs, it can mean an artisan who works with other materials, an intinerant worker or even some sort of master craftsman. I don't think the other gospels ascribe a profession to Jesus.