> How can they physically even come close to building a jet? A human can't do that either. Humans as a whole can do it because we have enough intelligence to i

> How can they physically even come close to building a jet? A human can't do that either. Humans as a whole can do it because we have enough intelligence to implement the whole chain of technology required to be able to do things on this scale. Not just the physical scale, but also the scale of the science and engineering required to make the thing actually work.