I don't really have a dog in this fight but I still don't get it.
Taking the usual guitar world's sense of "best" then you have:
- The "best" hardware in the world is Made in: Germany/Japan (depends on who you ask really but rule of thumb is, bridges=Germany, rest=Japan)
- The "best" bone for nuts and bridges Made in: Planet Earth as it is hard to find good bone in general as it is.
- The "best" tone woods are sourced from: Again, Planet Earth since, like DrNewcenstein already mentioned. American Alder, (Southern US) Swamp Ash, Canadian Maple, Honduran Mahogany, Macassar Ebony, Brazilian Rosewood, African Mahogany. And don't even get me started with woods like Limba, Koa, Wenge, Padauk etc.
So, by that logic, you can
EITHER have a guitar Made in USA
OR, have a guitar made out of the best possible components and raw materials
BUT NO BOTH.
Combine that with the fact that even today, for better or for worse, in the guitar world the ABSOLUTE BEST guitars are still perceived/expected to be "Made in USA" and you can see how that might be an issue for the entire US Guitar Industry...
I think that editorial says it best when they said that they'd like to meet even a single guitarist that would feel cheated if the manufacturer were to use the very best materials and components when building their Made in USA instruments.
Perhaps it'd be a good chance for the entire US Musical Instruments Industry to unite and take legal action against said law, or at least this particular interpretation of it.
But hey. like I said, no dog in this fight...