Modern papers are automated, some are even electronic.
But their technological advances don't mean that the first amendment doesn't apply to them. It also doesn't mean that radio, television, the internet, and magazines with color photographs, aren't protected as well. The White Owl Actually, I am not assuming anything like that. They wanted people available to repel invasion or other insurrection. Since there was no real Regular Army at the time, and no logistics to issue a mass quantity of arms, they wanted people to have weapons of their own.