Most of us free thinkers think that's a perfectly good reason, since the majority of our cookbooks, teaching, kitchen supply goods, etc., are based on what the majority of us want, not what some "foreigners" think we should use. Such a change to metric measures has been voted on many times by various levels of authority, and our non-metric system seems to be quite set in stone. Maybe metric will become more desirable when us oldsters die out. ;-)

N.