The issue, that's been discussed at length, is not on the validity of traditional music or the freedom of anyone who chooses to sing it. It's on the nonsense surrounding a definition which has lifted up the ladder behind it while pretending it's still in place. New music can never enter the canon. Transmission is impossible. The conditions that obtained when it was written are gone, if they ever existed in the first place. It is not under threat, it survives in rude good health as a finite, historical genre of music.