I suspect this is a troll, but I suppose it should be answered anyway.

The whole point of a song being traditional is that it was learned from tradition. If you learned it from a recording, you didn't learn it from tradition.

That doesn't make the song worse. It says nothing about the quality of the performance. But the whole point of saying something is traditional is the oral transmission. The word is INFORMATIONAL.

We've already lost the word "folk" to mean "acoustic singer-songwriter." Let's not mess with the word "traditional."