As someone who has lived in America and worked almost exclusively in customer service related fields knuckle draggers that make you look smart have mastered the imperial system. And funny enough those same knuckle dragger's minds explode when you try to explain the ridiculously easy metric system.
Oh and the USA still uses metric for pretty much anything important/scientific. Imperial is an idiotic system that basically only still exists in America because of idiots and business lobbying being cheap fucks.
Brexetiers love imperial because they're nostalgia riddled fuckwads who can't cope with the fact that the British Empire isn't what it once was and anything that reminds them of those days protects their feeble minds from inconvenient realities. Or maybe you have a foot fetish and the idea of measuring things by some arbitrary former monarch's foot size gets you off.