www.google.com makes as much sense as com.google.www
but
www.google.com/root/sub/subsub makes less sense than com.google.www/root/sub/subsub or subsub/sub/root/www.google.com
Since the latter has consistent increasing or decreasing of specificity, while the former has not.
This incidentally mirrors what I don't like about the date format MM/DD/YY.