When doctors "practice" medicine they aren't saying "We're amateurs just like band practice." They're just using the traditional wording. You also here this wit

When doctors "practice" medicine they aren't saying "We're amateurs just like band practice." They're just using the traditional wording. You also here this with other older professions like law. http://www.etymonline.com/index.php?term=practice http://www.etymonline.com/index.php?term=practice