Piracy does not produce media. Copyright holders are kind of lame for charging to watch something made decades ago and that already made a profit. Copyright law should be changed.

In order for access to media to be provided media has to exist. If those who create media cannot recover tte investments they make to create that media, less media will exist. Therefore piracy, which denies media creators the chance to recover their investments, harms society by reducing the potential amount of media that exists.

...at least, that's a hypothesis, but reality makes things trickier because not all media is a benefit to society. (As an example, those anime that were produced under the guidance of the Happy Science group.)