The discussion seems to be confusing traditional musicans and traditional music. (Plus the usual confusion between "musician" and "singer")

In my view it has to be somebody who has learned their musical skill because music is a part of their commumity rather than making a concious decision to become a folk musician.

There are still English travellers such as the Orchards who are genuinely "traditional" performers and some quite young "old timers" around like Mark Bazely.