In other words, yes we have CNC machines and electric saws and whatnot, reliable to a certain degree (you can still injure yourself badly), but it doesn't remove the need of a carpenter, because a carpenter also knows how to make a hammer from scratch even if he doesn't make one in his entire life.

eh, rather, a carpenter knows to swing a hammer in a pinch, doing say framing, even if they mostly use a nailgun.