You don't really give any reason why Fahrenheit is a better scale or why inches, or why feet and miles are particularly practical units. It seems to me that people say this simply because they are used to them. You don't convert to metric units and it feels awkward because you don't use metric units.

There is an issue with "kilometer" being a complex word for everyday use (as compared to a mile) in the English language. That's more a linguistic issue that about the unit itself. Other languages have solutions to that with shorter colloquial name for the unit.

Of course the imperial units give a good opportunity for being funny, in ways like specifying speeds in furlongs per fortnight. But you can do the same in SI-derived units, like parsecs per picosecond.