One of Elon main points was that you can't have all these ships built in clean rooms by PhDs.

You need a large number of workers, who can weld, move stuff around install stuff onto the rocket.

The most difficult to produce things, like the engine will be delivered.

There will still be a lot of engineers required, but maybe not as much as you would traditionally think.

There is also already a fair amount of heavy industry there so, its not like they are going to some total backwater.