Most company supply chains involve contract manufactures for at least some of the parts.
The Soviet Union tried to this approach - stealing technology to supplement their inability to innovate. I recall it didn't work out well for them.
The US system is really good at supporting and producing innovation. Its one of the major advantages that gave us the edge in WW2, the Cold War, and today.
The fact that people from all over the world are willing to move to the US to start their businesses will continue to enable the US to outcompete the knock-off economies IMO.
The people I've met who grew up behind the Iron Curtain/China all describe the energy that goes into avoiding the rules under those systems. Innovation isn't protected or rewarded under those systems.
Ripping off other's ideas is a natural outgrowth of that outlook.