The internet has been primarily derivative content for a long time. As much as some haven't wanted to admit it. It's true. These fancy algorithms now take it to the exponential factor.
Original content had already become sparsely seen anymore as monetization ramped up. And then this generation of AI algorithms arrived.
The several years before prior to LLMs becoming a thing, the internet was basically just regurgitating data from API calls or scraping someone else's content and representing it in your own way.