We don't want Americans to perform manual labor that oxen can do. We only want engineers and scientists and artist - people that can create value with their minds.
But how many are going to Harvard to be one of your elite scientists? Everyone else is priced out of housing and childcare and the global economy is not working out for them.
The only reason companies like Apple have moved manufacturing abroad is profit. And that profit is absolutely at the expense of the USA middle class.
If Apple wants to sell their products here then they must involve themselves in the economy and workplace of their consumers. If Apple will not do that and is only involved with the USA workforce as a pool of consumers then I would say 10% is not enough.