Because ANYONE can upload and publish music (if they created it) and you literally donΓÇÖt need a record label to publish music and get people to listen. Some people just like listening to music in the background. IΓÇÖve been listening to music on YouTube for probably a decade, long before I knew you could upload to it. ItΓÇÖs just fun to listen to music on it, listen to old songs you might have forgotten about etc, and itΓÇÖs got the added bonus of music videos.