Copyright law valorizes copying as a rare and noteworthy event. On the Internet, copying is automatic, massive, instantaneous, free, and constant. Clip a Dilbert cartoon and stick it on your office door and you're not violating copyright. Take a picture of your office door and put it on your homepage so that the same co-workers can see it, and you've violated copyright law, and since copyright law treats copying as such a rarified activity, it assesses penalties that run to the hundreds of thousands of dollars for each act of infringement.
There's a word for all the stuff we do with creative works — all the conversing, retelling, singing, acting out, drawing, and thinking: we call it culture.
Culture's old. It's older than copyright.
The existence of culture is why copyright is valuable. The fact that we have a bottomless appetite for songs to sing together, for stories to share, for art to see and add to our visual vocabulary is the reason that people will pay money for these things.