The first point you're trying to make doesn't seem to hold.

You use a subjective opinion on one unit's range as a proxy for all other units. How is the meter (cm, mm, km, etc) trash compared to the foot (inch, yard, mile, etc)? They're objectively better in every regard, not just for scientific purposes but in everyday life.

Come to think of it, it's the first time I'm seeing someone making that sort of statement rather than the usual "it's too difficult to change now" excuse.