I completely agree with balldancer!
I too was the prowd owner of lots of medals up to above Gold Star III and thought I could dance reasonably well. I got the shock of my life when comparing myself to low level competitors!
The other issue is it is not just students, but also qualified teachers.
In many cases, the teachers cannot move!
https://www.youtube.com/watch?v=8dZT28edCOU
https://www.youtube.com/watch?v=PA4c8WGboko&list=UU1xZx_mzT2vGiHd1jp0my8w