We’ve had enough concentration of resources in the hands of those who merely build technology that connects valuable things together, after having exploited market power to siphon off all the profit from the actually valuable things.
We're entering a new paradigm that copyright is not sufficient to handle. These AI models have sucked up the output of humanity itself, the entire commons. The public vs private distinction isn't that important. They're going to cause job losses across many fields, so we need a new solution. Relying on the court system to enforce copyright claims for the benefit of a single claimant is not a solution that scales to solve the actual problem here. Another thing is, foundational models are prone to monopoly because the barriers to access compute are so steep.
That wasn't much of a problem before copying was so cheap and easy, but today that would absolutely happen.