@freemo as we apply measurements, we disagree :)
We find that, for example, inches are scaled far better for so many projects than cm or mm, in the same way that degrees F are scaled better for human application than degrees C or K.
When it comes down to something ranging in size from around a baseball up to a table leg--roughly human sized things--the royal feet units are simply more practical, so we prefer them.
They make more practical sense.