I won't feed the trolls but, GUEST Smiler, the answer is clearly no.

If all the best performers in the world were Joan Baez soundalikes, we wouldn't want a folk festival full of them.

The name of the game is variety and if someone feels that adding (e.g.) Bhangra to the bill helps improve the variety and generates a wider interest in the event then that's great.

In the end, it's about bums on seats, not somebody's abstract idea of "quality".

;-)