That used to be true.
Nowadays, I don't really see how ex-advies are any more fair than infils. Most infils don't have the highest swordfighting skills anymore. And with dwindling population... would seem fair, to me at least, to allow infils to join tournaments now.
And all gov members at least as observers.
What people no longer make advies just to train swordfighting for the eventual change to infil?