Earlier quoted context omitted.
I wish it gets to that point. A country that doesn’t manufacture is a huge loser in the long run. I hope it comes back to America in a heavily automated, sustainable fashion.
There is plenty of manufacturing to go around. Buying from specialists is a better deal for everyone than trying to do a little of everything. The only exceptions is war machines (guns, ships...) - you need to have that in your country just in case. Though the more trade you do with others the more nobody wants war with you because they lose both the goods you make and the market for goods you buy from them.
There's open war, cold war, hegemon bullying, and lots of other conflicts. Look at how much China tried to sabotage the Australian economy this last year (and vice versa of course) even though China NEEDED Australian coal and resources for their industry. Political considerations in the short run has priorities, even if it's economically costly.
Besides, with more capital it's going to lead into cheaper manufacturing with automatization in higher labor countries. Sometimes it's better to have redundant factories in many different parts of the world. Even if it's only for innovation.