Surely it is just four (sometimes five) young men trying to make a living from their talents, thousands have done likewise and many with far less talent to begin with. Good luck to them, one is Finbar Clancy, a son of Bobby Clancy and nephew of Liam's. He knows how to play an audience, having learned with various combinations of Clancys , O'Connells and Powers, his relatives, over a good many years.
Good luck to him and his colleagues, if they're not for the "purists" then those critics may "switch off" . I'm sure the lads won't worry.