Coordinating work is hard. In addition to the programmers, you would need so many more people to coordinate and plan. And doesn't even include how to figure out

Coordinating work is hard. In addition to the programmers, you would need so many more people to coordinate and plan. And doesn't even include how to figure out what to produce in the 1st place. Large projects are incredibly difficult. That's one reason why things like the space program and its achievements are such a big deal. It wasn't just the cost and knowledge but the coordination of 100's of thousands of people to get the job done.