Just imagine if every country decided to make their own watches in the 20th century. You would have a very difficult time matching Swiss made mechanical watches.
Many countries are good at making something, because of various factors. Climate, labor cost, material cost, labor skills, shipping facilities, taxes, etc all enter in the picture.
It is more efficient to specialize in products you make best instead of trying to make everything. US has the advantage in aircraft, pharmaceuticals, business software, medical devices, weapons, etc. I would leave shoe making & shirt making to other countries.
The Swiss exported a lot of watches because they were good at making watches; not because their watches were dirt-cheap, manufactured by slaves living in poisonous filth.