The printing press lets people reproduce other people's thoughts more widely. As to reproducing your own thoughts more widely, this is why I was describing a cultural "canon" as being the foundation upon which new ideas can be built. In the AI world, the "new" idea is effectively just the prompt (and iterative direction); everything else is a remix of the canon. But pre-AI, in order for anyone to understand your new idea, you had to mix it into the existing canon as well.

Edit: to be abundantly clear, I'm not exactly hoping AI can do very well. It seems like it's going to excel at automating the parts of software development that I legitimately enjoy. I think that's also true for other creator-class jobs that it threatens.