[hxa7241]

Copyright is not justified by it being a way to maximise producers' revenue. Such principle would set no limit to laws that restrict people in general to make money for some few. That should immediately seem awry.

Informational goods are nonrival. The right and wrong of their use is fundamentally different from that of rival goods. One does not 'take' informational goods, one copies them. Normal property is, as a first simplification/approximation, justified by the loss of taking. And that because moral rules in general are, roughly speaking, justified by how they affect other people. Since copying lacks that effect of loss it obviously cannot reasonably be treated in the same way.