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Why must we use the international foot, when the international community largely doesn't use the foot at all?
In the end, every unit of measure is completely arbitrary to the average Joe. Look at the history of the definition of a meter. You think that in 1793, they had any real clue what the distance represented by one ten-millionth of the distance between the North Pole and the Equator along the meridian through Paris was?
Lots of equally useless definitions along the way to the current one, which is the length of the path traveled by light in vacuum during a time interval of 1/299792458 of a second.
Yeah, I can relate. Let me get my dad's old stopwatch. It's here somewhere.
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