Absolutely agree 100%!
So you should just say original music only. Somebody should create a karaoke/cover community for those who wish to do that stuff.
I myself prefer the original music over covers. Because the songwriting is generally better. There is much more passion and emotion in it. Which usually results in a much more over all experience for the listener.
I do covers mainly cause it's fun and I do them to learn about recording and mixing mastering stuff. But I dont release them to the world unless I am proud of them. Lol.