Feels like the old "it's not piracy, it's copyright infringement".
It can't be plagiarism, since LLMs do not have ownership over their output. There's no attribution, because an LLM isn't a person.
And to be honest, I do not quite understand the need for attribution, either. Nevermind LLMs, I also don't know or care who made any of the memes I know and share. Neither do I know who wrote vim, grep, Firefox or who invented the jpg format. I don't want to know, either. It doesn't matter.