In the US the author's rights don't even come into the motivation. They don't exist a priori as free speech would let you share any "IP" you want. The temporary monopoly is ONLY granted to encourage more creation, not as a recognition of author rights.
In the EU it's a bit more complicated but I still don't see authors rights as a primary motivator for copyright specifically.
sure, and we can adjust that without abolishing copyright, nor justifying what is basically theft to go around it. I don't know why every-time this conversation comes up peopel instantly go to "abolish copyright". Is no one else here a creator of some kind?