The US literally doesn't have the people to do this.
Yes and no.
The US is still an economy with the ability to tackle very complex tasks with its industrial base. Up until fairly recently, it was a major destination for people seeking higher education and work in specialized fields in STEM, which is necessary for the execution of the projects that companies like Apple want to do.
The problem is that we now have an anti-immigration administration, and are home to a number of multinational companies - Apple's a great example - that feel that their one and only obligation is to create value for shareholders. They don't want to throw the money needed at American engineer salaries, because money paid to the American engineer is money not paid to a shareholder.
We can possibly deal with the administration. The US isn't the only country in the world with a nativist movement; China does it with non-Han peoples within its borders. The real hangup is making a bunch of Americans with capital feel some sort of loyalty towards their own country and its workers.
China didn't either, until it did. US business isn't willing to build up the workforce to do this but we definitely have the people.