Threads like this are why I discuss this shit in Lemmy, not in HN itself. The idiocy in the comments there is facepalm-worthy.
Plenty users there are trapping themselves in the "learning" metaphor, as if LLMs were actually "learning" shit like humans would. It's a fucking tool dammit, and it is being legally treated as such.
The legal matter here boils down to: OpenAI is picking content online, feeding it into a tool, the tool transforms it into derivative content, and the derivative content is serviced to users. Is the transformation deep enough to make said usage go past copyright? A: nobody decided yet.