The point is that it's a fraction of the number of employees needed to accomplish the same tasks 50 years ago or even 10 years ago.
The bottom line is this: It's an advanced economy sector industry creating jobs in the US, where none existed before. Not in spite of, but because it's a highly automated factory, it can be built in the US. The more "great American" companies that build advanced factories, the better for the US economy.
Frankly, I'm most impressed that this project seems to be on schedule. Gives me a little encouragement that we can execute on mega projects like this.