head turner....Arrogant ? The Americans....I would suggest you give us too much credit....after all one cannot expect much out of a race of people that tried to make salt-water tea.
But then I drive my American made pickup truck...do mechanical things with my American made tools on American made products...and thus I have no problem dealing in American units....until I work on my Kubota farm tractor...then I buy American made metric tools and buy American made parts (filters...etc...) being Japanese made....it has not needed any parts yet.
Thus, I fail to see the big deal....all my torque wrenches are marked in American units...as are my tech manuals thus no conversions needed.
But then.....being the big boy on the block when it comes to building things....I guess we can get away with it. That is not being arrogant....just realistic.