It is not a matter of refusing to hear new songs. It is merely a matter of being accurate in not referring to them as "folk songs". You might as well call potatoes turnips. AFter all, lots of people once ate turnips and along came this new root vegetable. Why bother to give it a name different from the established term "turnips"?

There has been posted to another thread the correct definition of "folk song". As noted there, that's the definition. End of story.