I was not talking about the yard at all. I was talking about 440. Which is a number not wholly divisible by 12.

Be true. It isn’t a duodecimal system. Sometimes it needs 12 to get to the next highest unit, sometimes 3 or 8 or 16 or 14 or 5280.

Being entirely duodecimal would be kinda cool in fact. But it’s not applicable and shouldn’t be used as an argument pro US customary system.