Those don't work too well when you're walking and climbing for miles. Feet get hot and sweaty (they get wet from the inside), almost no matter what and Muck boots just don't breathe like a gore-tex type of membrane boot.
I know the desire to have things made in the USA but the best boots come out of Italy. They just do. It's a hard truth, just like the best optics come out of Germany/Austria.
There are companies like Schnees and Whites that make leather lined boots too, if that's what you're looking for. Otherwise there are a lot of good brands that make all leather exterior boots like Zamberlan, Kenetrek, the aforementioned and others. Yeah they're expensive.