Why they won't go metric

Do you think the reason those pesky Americans won’t switch to our nicely engineered metric system is that theirs just sound cooler?

I mean, “miles” rolls off the tongue a lot easier than “kilometers”, “inches” is definitely nicer than “centimeters”, “gallons” sounds better than “liters”, and I’d prefer “ounces” to “grams” or “centiliters”.

So is it a case of beautiful engineering wrapped in poor user experience design?