Oy...

Speaker+Listener+Subject = (sub)genre. Nobody speaks for both sides of the convo (obviously) and the music just plain does not care. Labels are worse than useless if you're not even in the right book, much less on the same page.

If just one person in the audience knows the true copyright history of a song and everybody else is ignorant of same... you'll get two genre for one performance of one song by one artist.

Walk in to any library on the Dewey system and you'll find Beethoven shelved under Classical. Same for a brick & mortar record store. Romantic won't have a bin unless it's a specialty shop.

Silly thing is, I dont know anybody that actually uses the labels for themselves. 99.9% of the folks I know file their own collections all jumbled together and shelved by media, then alpha-by-artist.