It’s so frustratingly hard to convince some people that their world does not exist in a vacuum. Even if you could magically move a job to your country/state/county or even your city/neighborhood, it would most likely still depend on work done elsewhere in the world. I just don’t know where to start with this viewpoint except to say it is obviously wrong to assume that one country (even a bigger one such as the US) can just handle itself.
Supply chain is everything. I have built this for a vendor (USA) in China and moved it to Malaysia (with same manufacturer). The basic issue is parts. They are all in China. It is a simple statement with so many parts behind it. Edit typo
Apple used to make computers in the USA. But all the current iPhone parts are not made in the USA. You'd have to import them then assemble them in the USA. Didn't Trump have tarrifs on imports?