As someone who has been teaching a very short time as a way to pay for my continuing dance education, I think there's another relevant point. Beginning newbie off-the-street dancers do all kinds of crazy stuff that one doesn't expect, and it can sometimes be harder to figure out why it isn't working than to diagnose higher-level technique problems. Falling out of a spiral? Yeah, I know why that's happening. But the crazy promenade situation that's happening on day five of beginning American foxtrot - there are a lot of contributing factors that have to be separated out and taught in layers. Not that I think I am super-awesome-amazing at this - in another thread recently I think I said that I feel like, in comparison to the people I take lessons from, a hot dog vendor in a room of top chefs - but simply that it takes some experience and a bit of an eye to figure out what is happening with newbies even more, sometimes, than with more experienced dancers. That has got to be pretty difficult if you are learning to teach and learning to dance at the same time, I would imagine. I think for teachers gaining experience and trying to provide students with the best service they can, it's like this (if you'll allow the metaphor to be dragged on and on): you want to make sure people are getting decent delicious food and nobody is going home with bad oysters. And not everybody's palette is ready for black truffles, anyway.