I think copyright is far for being the most important aspect related to AI, it's geopolitical and economical. And even if it was the most important, there is only a case to be made for 1. that copy used to train models and 2. rare or induced regurgitation by targeted prompting.

The original work is not replicated identically, why would we replicate a work when it can be more easily seen in original or replaced with an alternative options online. We use AI to produce new outputs to new situations. We already have had drives and networking for plain copying.