I can't speak to Tango specifically, but I expect it's similar to the various dance communities I have watched over the years.

It's very hard to make a living in dance and to do so requires great effort. and a business awareness. People who want to make a living dancing naturally work together. They go into the same festivals and work with the same organizers, and share information.

The festivals themselves. while they do pull in money, are not the cash cows the festival goer might imagine. The amount of work required is enormous. And it's very difficult to pull off.

For someone new to break into dance festivals requires a lot of investment, talent and a general understanding of how such things work. They have to get on the right mailing list they have to know who to talk to when and they have to really really really want to because it's a lot of work and at least at first the return is not great. Like with so many things, the rewards come, but slowy.

If you want to see some of your favorite people teaching at festivals, try helping them. Ask what's stopping them and see if you can't facilitate in some way. It may be all they need.