Well I think we must draw a line between classical music written by Bach and the like and performed by contemporary players and pop songs written by songwriters and played by pop bands. True in theory it's the same thing really: replaying what's already been written, but imop there is a line that can be drawn here. Whatever, I'm feeling lightheaded and forgot what point I'm making.

Btw, be it pop OR classical, I don't see how any true musician can be contently playing ONLY other people's material with no room for personal musical expression. Just my opinion.