How do we know they don't? I know people who go to all and every workshop under the sun and they STILL CAN'T DANCE. But they teach, oh, yes they do. And I've also seen good student material come out of such teacher's classes. So what is right? It's a bit of a riddle. Like where do flies go in winter...There are SOOOOOO many resources out there to help you become a better teacher or dancer -- and so many "teachers" don't ever bother to check them out. I'm not saying you need to get a degree in teaching, but would it kill some of these people to read an article? Watch a video?