It could, but you keep harking back exactly to the UK being traditionalist as your proof (your one and only piece of evidence it seems) that the UK is an Si nation. So if the UK is S for this reason, so is the US.And why does this support your argument? Why couldn't that just be inferior Fi?
Basically, you painted yourself into this corner.
It's actually not known for that, no. It used to be, but nowadays Germany and Japan have overtaken the US (especially Japan).What the US is better known for is being possibly the most innovative and dynamic society in the world.