how is music being disposable bad?

If the music is bad then it being disposable is a good thing right?

And if the music is good it won't be disposed of. So, where's the problem?

If you mean it puts more pressure on the artists to make quality music; knowing that their music will be disposed of if it's garbage then that sounds like a positive to me the music consumer.

And really unless I'm pressed for space on my HD I never delete anything I download, because I know eventually I might come to enjoy the music even if it's not hitting me in the moment.