For centuries, IP-based goods have had a significant marginal cost.
With the printing press, this cost went down, but it still took a significant effort to create a copy; giving that copy some independent value.
Digital media has practically zero marginal cost. So long as you are connected to someone with data, it is trivial, and practically free to copy that data.
There are efforts (DRM) to fill the void of marginal cost; but they are hacked together, and fundamentally flawed.
With the printing press, this cost went down, but it still took a significant effort to create a copy; giving that copy some independent value.
Digital media has practically zero marginal cost. So long as you are connected to someone with data, it is trivial, and practically free to copy that data.
There are efforts (DRM) to fill the void of marginal cost; but they are hacked together, and fundamentally flawed.