This entire section reads like, oddly, the reverse of the "special pleading" argument that I usually see from artists. Instead of "Oh, it's fine for other fields, but for my field it's a horrible plagiarism machine", it's the reverse: "Oh, it's a problem for those other fields, but for my field get over it, you shouldn't care about copyright anyway".
I'm all for eliminating copyright. The day I can ignore the license on every single piece of proprietary software as I see fit, I'll be all for saying that AIs should be able to do the same. What I will continue to complain about is the asymmetry: individual developers don't get to violate individual licenses, but oh, if we have an AI slurp up millions of codebases and ignore their licenses, that's fine.
No. No, it isn't. If you want to ignore copyright, abolish it for everyone. If it still applies to everyone else, it should still apply to AIs. No special exceptions for mass-scale Open Source license violations.
It's interesting as typeface plagiarism became rampant beginning in the 70s when more accurate photo reproductions made it trivial. This was problematic for designers wanting to make a livelihood, which is something ITC sought to mitigate by better up-front payments (IIRC from U&lc's coverage) to incentivize quality typeface creation.
There's a distinction though between literal plagiarism and just inspiration from elements. US copyright law doesn't protect either for typeface forms but ironically it does allow copyright for the code used in font files.
I've seen OpenAI's o3-mini (their reasoning model) suggest verbatim code and comments that I found on Github predating LLMs by years. It seems the more times the same code and comment appears online the more likely this is to occur. I'd imagine there would be studies looking into the scope and frequency this occurs and how much is considered fair use.