A rising tide lifts all boats - except when you’re using the water from one boat to do all the lifting.
There have been health issues as in the whole Chinese drywall fiasco. Engineers have found substandard steel in steel that had been supposedly tested and passed.
On the national security front, the Chinese have been accused of building backdoors into chips that go into computers that control military equipment and civil aircraft.
Not having manufacturing facilities on US soil could be a huge liability if the US is involved in any prolonged confrontation.
Outsourcing is a win-win for everybody in the long term.
Customers and investors drive businesses, and customers demand lower prices and investors demand higher profits. In order to lower their cost structure, companies outsource non-critical activities to places where they can get the most value for their money.
This, in turn, allows them to offer their products at a lower price, and depending on what the company does, millions of customers could benefit. Likewise, the investors then receive higher profits and better returns on their investments.